Boat race - Amazon Web Services...Step 2 Character movement Start by creating a character that can move left and right, and can climb up ladders. The project contains a backdrop with

26/05/2020 Boat race | Raspberry Pi Projects

https://projects.raspberrypi.org/en/projects/boat-race/print 1/18

Projects

Boat race

Create a boat-racing game in which you have to

avoid obstacles

Step 1 Introduction

In this resource, you are going to learn how to make a racing game. The player uses the mouse to navigate a boat

to an island without bumping into obstacles.

What you will make

What you will need

Hardware

A computer capable of running Scratch 3

Software

Scratch 3 (either online (https://rpf.io/scratchon) or o�ine (https://rpf.io/scratcho�))

Downloads

Downloads can be found here (http://rpf.io/p/en/boat-race-go).

https://rpf.io/scratchon

https://rpf.io/scratchoff

http://rpf.io/p/en/boat-race-go



What you will learn

Use operators to compare numbers in Scratch

Add code to detect when a sprite is touching a colour in Scratch

Use a variable to record the time in Scratch

Additional information for educators

If you need to print this project, please use the printer-friendly version (https://projects.raspberrypi.org/en/projects/boat-race/print).

You can �nd the completed project here (http://rpf.io/p/en/boat-race-get).

https://projects.raspberrypi.org/en/projects/boat-race/print

http://rpf.io/p/en/boat-race-get



Step 2 Getting started

Open the starter project.

Online: open the online starter project at rpf.io/boat-race-starter-on (http://rpf.io/boat-race-starter-on).

If you have a Scratch account you can make a copy by clicking Remix.

O�ine: download the o�ine starter project from rpf.io/p/en/boat-race-go (http://rpf.io/p/en/boat-race-go), and then open it using the o�ine editor.

If you need to download and install the Scratch o�ine editor, you can �nd it at rpf.io/scratcho� (http://rpf.io/scratcho�).

The project includes a boat sprite, and a race course backdrop with:

Wood that the boat sprite has to avoid

A desert island that the boat has to reach

http://rpf.io/boat-race-starter-on

http://rpf.io/p/en/boat-race-go

http://rpf.io/scratchoff



Step 3 Controlling the boat

The player will control the boat sprite with the mouse.

Add code to the boat sprite so that it starts in the bottom left-hand corner pointing up and then follows

the mouse pointer.

when clicked

point in direction 0

go to x: -190 y: -150

forever

point towards mouse-pointer

move 1 steps



Test your code by clicking the green �ag and moving the mouse. Does the boat sprite move towards the

mouse pointer?

What happens when the boat reaches the mouse pointer? Try it out to see what the problem is.



To stop this from happening, you need to add an if block to your code, so that the boat sprite only

moves if it is more than 5 pixels away from the mouse pointer.

This is what your code should look like:

when clicked


go to x: -190 y: -150

forever

if distance to mouse-pointer > 5 then


move 1 steps

Test your code again to check whether the problem is now �xed.



Step 4 Crashing!

At the moment, the boat sprite can simply sail through the wooden barriers! You’re going to �x that now.

You need two costumes for your boat sprite: one normal costume, and one for when the boat crashes.

Duplicate your boat sprite’s costume, and name one costume ‘normal’ and the other ‘hit’.

Click on your ‘hit’ costume, and use the Select tool to grab pieces of the costume and move and rotate

them to make the boat look like it has crashed to pieces.



Now add code to your boat so that it crashes and breaks up when it touches any brown wooden barriers.

Here’s what your code should look like:

when clicked


go to x: -190 y: -150

forever

if distance to mouse-pointer > 5 then


move 1 steps

if touching color ? then

switch costume to hit

say Noooooo! for 2 seconds

switch costume to normal


go to x: -190 y: -150



You should also add code to make sure that your boat sprite always starts out looking ‘normal’.

Test your code again. If you try to sail the boat through a wooden barrier now, the boat should crash and

then move back to its starting position.



Step 5 Winning!

Now add another if statement to your boat sprite’s code so that the player wins when they make the

boat arrive at the yellow island.

When the boat gets to the island, the game should say ‘YEAH!’, and then it should end.

Here’s what your new code should look like:

Don’t forget that this new code needs to be inside the forever loop.


say YEAH! for 2 seconds

stop all



Challenge: sound e�ects

Can you add sound e�ects that play when the boat crashes or reaches the island?

You could even add background music!

Challenge!



Step 6 Adding a timer

Now you will add a timer to your game, so that the player has to get to the island as quickly as possible.

Add a new variable called time to your Stage.

You can also choose a look for your timer by changing how your new variable is displayed.

Now add code blocks to your Stage so that the timer counts up until the boat reaches the island.


when clicked

set time to 0

forever

wait 0.1 seconds

change time by 0.1



Test out your game and see how quickly you can get the boat to the island!



Step 7 Obstacles and boosters

Right now the game is far too easy, so you will add some things to make it more interesting.

First, you’ll add some boosters to speed up the boat.

Next you’ll add a spinning gate that the boat has to avoid.

Edit your Stage backdrop by adding in some white booster arrows.

Now add more code blocks to your boat’s forever loop so that the boat sprite moves three extra steps

when it touches a white arrow.


move 3 steps

Test your game to see whether your new booster arrows speed up the boat.



Add a new sprite that looks like this, and call it ‘gate’:

Make sure that the colour of the gate sprite is the same as the colour of the wooden barriers.



Make sure that the centre of the gate sprite is positioned in the middle.

Add code to your gate sprite to make it spin slowly forever.


when clicked

forever

turn 1 degrees

Test your game again. You should now have a spinning gate that you need to stir your boat around.



Challenge: improving your game

Can you add more obstacles to your game? For example, you could add green slime to your backdrop and

make changes to the code so that the slime slows the boat down when the player lets them touch.

You could add a moving obstacle, for example a log or a shark!

Can you turn your game into a race between two players? The second player will need to control their boat

using the up arrow to move forward and the left and right arrow keys to turn.

Can you create more levels by adding di�erent backdrops, and can you then allow the player to choose

between levels?

Challenge!



Step 8 What next?

Congratulations on completing the ‘Boat race’ project! Would you like to try something a little more challenging?

You could try out the Memory (https://projects.raspberrypi.org/en/projects/memory?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects) project.

Published by Raspberry Pi Foundation (https://www.raspberrypi.org) under a Creative Commonslicense (https://creativecommons.org/licenses/by-sa/4.0/).

View project & license on GitHub (https://github.com/RaspberryPiLearning/boat-race)

https://projects.raspberrypi.org/en/projects/memory?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects

https://www.raspberrypi.org/

https://creativecommons.org/licenses/by-sa/4.0/

https://github.com/RaspberryPiLearning/boat-race

26/05/2020 Dodgeball | Raspberry Pi Projects

https://projects.raspberrypi.org/en/projects/dodgeball/print 1/29

Projects

Dodgeball

Create a platform game in which you dodge moving

balls to reach the end of the level

Step 1 Introduction

You’ll learn how to create a platform game in which the player has to dodge moving balls to reach the end of the

level.

What you will need

Hardware


Software

Scratch 3 (either online (https://scratch.mit.edu/projects/editor/) or o�ine (https://scratch.mit.edu/download/))

Downloads

You can �nd the downloads here (http://rpf.io/p/en/dodgeball-go).

https://scratch.mit.edu/projects/editor/

https://scratch.mit.edu/download/

http://rpf.io/p/en/dodgeball-go



What you will learn

How to use the keyboard to control a sprite

How to use the if, then, else Scratch block

How to clone a sprite

Additional notes for educators

You can �nd the completed project here (http://rpf.io/p/en/dodgeball-get).

http://rpf.io/p/en/dodgeball-get



Step 2 Character movement

Start by creating a character that can move left and right, and can climb up ladders.

The project contains a backdrop with platforms:

Open the ‘Dodgeball’ Scratch starter project.

Online: open the starter project at rpf.io/dodgeball-on (http://rpf.io/dodgeball-on).


O�ine: download the starter project from rpf.io/p/en/dodgeball-get (http://rpf.io/p/en/dodgeball-get) and then open it using the o�ine editor.

Choose a new sprite as the character the player will control, and add it to your project. It’s best if you

choose a sprite with multiple costumes, so that you can make it look as though it’s walking.

http://rpf.io/dodgeball-on

http://rpf.io/p/en/dodgeball-get



Add code blocks to your character sprite so that the player can use the arrow keys to move the character

around. When the player presses the right arrow, the character should point right, move a few steps, and

change to the next costume:

when clicked

forever

if key right arrow pressed? then


move 3 steps

next costume

If your sprite doesn’t �t, adjust its size.



Test out your character by clicking the �ag and then holding down the right arrow key. Does your

character move to the right? Does your character look like it is walking?

Add code blocks to the character sprite’s forever loop so that it walks left if the left arrow key is

pressed.

Your code should look like this now:

when clicked

forever

if key right arrow pressed? then


move 3 steps

next costume

if key left arrow pressed? then

point in direction -90

move 3 steps

next costume



Test your new code to make sure that it works. Does your character turn upside-down when walking to

the left?

If so, you can �x this by clicking on the direction of your character sprite, and then clicking on the left-

right arrow.

Or if you prefer, you can also �x the problem by adding this block to the start of your character’s script:

set rotation style left-right



To climb a pink ladder, your character sprite should move a few steps upwards on the Stage whenever

the up arrow is pressed and the character is touching the correct colour.

Add inside your character’s forever loop to change the character’s y (vertical) position if the up

arrow is pressed and the character is touching the colour pink.

if key up arrow pressed? and touching color ? then

change y by 4

Test your code. Can you make the character climb the pink ladders and get to the end of the level?



Challenge: completing the level

Can you add more code blocks to your character sprite to make the sprite say something if it gets to the green

door?

Challenge!



Step 3 Gravity and jumping

Now you’re going to make your character move more realistically: you’re going to add gravity to your game and give

the character the ability to jump.

In the game, move your character so that it walks o� a platform. Do you see that it can walk into empty

space?

To �x this, add gravity to your game. To do this, create a new variable called gravity.

You can hide this variable from your Stage if you want to.



Add these new code blocks that set gravity to a negative number and use the value of gravity to

repeatedly change your character’s y-coordinate:

when clicked

set gravity to -4

forever

change y by gravity

Click the �ag, and then drag your character to the top of the Stage. What happens? Does the gravity

work as you expect?



Gravity shouldn’t move the character sprite through a platform or a ladder! Add an if block to your code

to only let the gravity work when the character is in mid-air. The gravity code should then look like this:

when clicked

set gravity to -4

forever

if not touching color ? or touching color ? then

change y by gravity

Test the game again to see whether gravity works correctly now. Does your character sprite stop falling

when it touches a platform or a ladder? Can you make the character walk o� the edge of platforms and

fall onto the level below?



Now add code to make your character jump whenever the player presses the space key. One very easy

way to do this is to move your character up a few times:

Because gravity is constantly pushing your character down by 4 pixels, you need to choose a number

greater than 4 in your change y by (4) block. Change the number until you’re happy with the height

the character jumps.

when space key pressed

repeat 10

change y by 4

Test out your code. Notice that the jumping movement isn’t very smooth. To make jumping look

smoother, you need to move your character sprite by smaller and smaller amounts, until it is not rising

any higher.

To do this, create a new variable called jump height. Again, you can hide this variable if you prefer.



Delete the jumping code you added to your character sprite, and add this code instead:

This code moves your character up by 8 pixels, then 7.5 pixels, then 7 pixels, and so on, until it does not

rise any higher. This makes jumping look much smoother.


set jump height to 8

repeat until jump height = 0

change y by jump height

change jump height by -0.5

Change the value of the jump height variable that is set before the repeat starts. Then test your

game.

Repeat these two steps until you’re happy with how high the character jumps.



Challenge: better jumping

Even if the character is already in mid-air, it jumps whenever the player presses the space bar. You can see this

behaviour if you hold down the space bar.

Can you change the character sprite’s code for jumping so that your character can only jump if it touches a blue

platform?

Challenge!



Step 4 Dodging balls

Your character can move and jump now, so it’s time to add some balls that the character has to avoid.

Create a new ball sprite. You can choose any type of ball you like.

Resize the ball sprite so that the character can jump over it. Try making the character jump over the ball

to test whether the ball is the right size.



Add this code to your ball sprite:

when clicked

hide

forever

wait 3 seconds

create clone of myself



This code creates a new clone of the ball sprite every three seconds. Each new clone moves along the

top platform and then drops.

when I start as a clone

go to x: 160 y: 160

show

repeat 22

change y by -4

repeat 170

change x by -2

turn 6 degrees

repeat 30

change y by -4

delete this clone

Click the �ag to test the game.



Add more code to your ball sprite so that clones of it move across all three platforms.

The code for your ball sprite clones should look like this:


go to x: 160 y: 160

show

repeat 22

change y by -4

repeat 170

change x by -2

turn 6 degrees

repeat 30

change y by -4

repeat 180



change x by 2

turn 6 degrees

repeat 30

change y by -4

repeat 170

change x by -2

turn 6 degrees

delete this clone

Now add some code blocks to broadcast (send) a message if your character gets hit by a ball!

Add this code to your ball sprite:


forever

if touching Pico walking ? then

broadcast hit



Finally, add code blocks to your character sprite to make it move back to its starting position when it

receives the hit message:

when I receive hit


go to x: -210 y: -120

Test out your code. Check whether the character moves back to the start after touching a ball.



Challenge: random balls

The balls that your character has to dodge all look the same, and they appear at regular three-second intervals.

Can you add code to your game so that the balls:

Don’t all look the same?

Appear after a random amount of time?

Are a random size?

Challenge!



Step 5 Lasers!

To your game a little harder to complete, you are going to add lasers!

Add a new sprite to your game and call it laser. It should have two costumes: one called ‘on’, and one

called ‘o�’.

Place your new laser sprite between two platforms.



Add code to your laser sprite to make it switch between its two costumes.

If you prefer, you can change the code shown above so that the sprite waits a random amount of time

between costume changes.

when clicked

forever

switch costume to on

wait 2 seconds

switch costume to off

wait 2 seconds



Finally, add code to your laser sprite so that the laser sprite broadcasts a ‘hit’ message when it touches

the character sprite.

This is the code you should add:

You don’t need to add any extra code to your characters sprite, because the character sprite already

knows what to do when it receives the broadcast 'hit'!

when clicked

forever

if touching Pico walking ? then

broadcast hit

Test out your game to see if you can move the character past the laser. If the laser is too easy or too hard

to avoid, change the wait times in the code for the laser sprite.



Challenge: more obstacles

If you think your game is still too easy, you can add more obstacles to it. The obstacles can be anything you like!

Here are some ideas:

A dangerous butter�y

Platforms that appear and disappear

Falling tennis balls that must be avoided

You could even design another backdrop to create the next level. Then add code so that, when your character

reaches the green door, the game switches to the new background:


switch backdrop to next backdrop

go to x: -210 y: -120

wait 1 seconds

Challenge!





Challenge: improved gravity

There’s one other small bug in your game: gravity doesn’t pull the character sprite downwards if any part of the

sprite is touching a blue platform. So even if the sprites head touches a platform, the sprite doesn’t fall! You can

test this yourself: make your character climb most of the way up a ladder, and then move the character sideways

beneath a platform:

To �x the bug, you �rst need to give your character sprite new trousers that have a di�erent colour (on allcostumes).

Then replace this code block:

with this code block:

To make sure you’ve �xed the bug, test the game after you’ve made these changes!

touching color ?

color is touching ?

Challenge!



Challenge: more lives

Right now, your character goes back to its starting position when it gets hit. Can you also give the character

sprite three lives, and make it lose one life when it gets hit? Here’s how your game could work:

The game starts with three lives for the character

Whenever the character gets hit, it loses one life and moves back to the start

If there are no lives left, the game ends

Challenge!



Step 6 What next?

Have a go at our Brain game (https://projects.raspberrypi.org/en/projects/brain-game?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects) project, in which you can create your own maths quiz.


View project & license on GitHub (https://github.com/RaspberryPiLearning/dodgeball)

https://projects.raspberrypi.org/en/projects/brain-game?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects



https://github.com/RaspberryPiLearning/dodgeball

26/05/2020 CATS! | Raspberry Pi Projects

https://projects.raspberrypi.org/en/projects/cats/print 1/20

Projects

CATS!

Create a game in which you guide cats to safety and

stop them from falling into holes

Step 1 Introduction

In this project, you will create a game in which you need to guide cats to safety and not let any of them fall through

the gaps!

What you will make

What you will learn

How to use a forever loop to constantly generate moving cats

How to use a repeat until loop to ensure your cats follow a line



What you will need

Hardware


Software

Scratch 3 (either online (http://rpf.io/scratchon) or o�ine (http://rpf.io/scratcho�))

Downloads

O�ine starter project (http://rpf.io/p/en/cats-go)


You can �nd the completed project here (http://rpf.io/p/en/cats-get).

http://rpf.io/scratchon


http://rpf.io/p/en/cats-go

http://rpf.io/p/en/cats-get



Step 2 Draw lines

Open the ‘CATS!’ Scratch starter project.

Online: open the starter project at rpf.io/cats-on (http://rpf.io/cats-on).


O�ine: open the starter project (http://rpf.io/p/en/cats-go) in the o�ine editor. If you need to

download and install the Scratch o�ine editor, you can �nd it at rpf.io/scratcho� (http://rpf.io/scratcho�).

Add the Pen extension to your project.

Click on the sprite called ‘Pen’, and add code to set the pen colour to the same blue as the obstacles on

the Stage.

To select a colour, click on the colour square in the set pen color block to make your mouse cursor

turn into a pipette, and then click on the correct colour on the Stage.

when clicked

set pen color to

erase all

set pen size to 5

http://rpf.io/cats-on

http://rpf.io/p/en/cats-go




Add some more code to make the sprite follow the mouse pointer. Test your program to check that the

code works.

forever

go to mouse pointer



Add some code to tell the sprite to draw a line on the Stage if the mouse button is pressed down.


when clicked

set pen color to

erase all

set pen size to 5

forever

go to mouse pointer

if mouse down? then

pen down

else

pen up



You probably see that a blue dot always appears in the top right-hand corner of the Stage (it’s circled in the image

above). This is because, when you click the green �ag to start the game, you press the mouse down, and so the

pen immediately starts drawing.

Test your code. You should be able to click and drag with the mouse to draw a blue line on the Stage.



To stop this from happening, add a pen up block at the start of the script, and a wait one second

block above the forever block.

when clicked

pen up

set pen color to

erase all

set pen size to 5

wait 1 seconds

forever

go to mouse pointer

if mouse down? then

pen down

else

pen up



Step 3 Clone cats

You want a never-ending stream of cats that the player has to guide along the path to the exit.

If you run the program now, nothing happens on the Stage. To check that a new Cat sprite clone is created every

three seconds, make each clone appear and fall out of the sky.

Click on the sprite called ‘Cat’, and add some code to hide the sprite, and also to clone it every three

seconds.

when clicked

hide

forever


wait 3 seconds



When you click the green �ag, you should see a new cat fall from the top of the Stage every three seconds. Every

cat should land in a big pile of overlapping cats on the blue �oor at the bottom.

Add code to tell the sprite that when it starts as a clone, it should show itself and fall until it

touches the blue �oor that is drawn on the Stage.



show

repeat until touching color ?

change y by -2



Step 4 Make the cats move

Once a cat reaches the �oor, it should step slowly to the right.

If you draw a bridge across the gap so that the cats can get all the way to the right side of the Stage, you can see

that they end up getting stuck walking into the right wall.

Add code to the when I start as a clone section to make the cat sprite move ten steps, and

switch between the sprite’s two costumes every 0.1 seconds to make the cat look like it’s walking.



show

forever

move 10 steps


change y by -2

next costume

wait 0.1 seconds

Press the green �ag and check that the cats now move along the blue platform at the bottom.



Remove the forever loop, and instead add a di�erent loop to make the cats only walk until they reach

an edge. When a cat reaches the edge of the Stage, it should disappear.


show

repeat until touching edge ?

move 10 steps


change y by -2

next costume

wait 0.1 seconds

delete this clone



You may notice that, if the cats fall into the hole, they don’t disappear but instead get stuck at the bottom. This is

because they keep trying to fall downwards.

This is the part of the code that tells the cat to keep falling until it touches blue:

However, in the hole, the cat can never reach blue, so it is stuck forever.

Press the green �ag and check that the cats disappear when they reach the edge of the Stage.


Add more blocks to this loop so that it repeats until the cat sprite is touching blue or touching the

edge. This way, the sprite stops trying to fall if it reaches the edge of the Stage.

repeat until touching color ? or touching edge ?



Step 5 Stick to the lines

You might notice that, if you draw a low bridge between the two platforms, or a line that slopes upwards, the cats

end up walking through the platform rather than on top of it!



In the code for the cat sprite, add another loop before the next costume block. This time, the loop

should tell the cat to move upwards by 2 until it is not touching blue.



show


move 10 steps


change y by -2

repeat until not touching color ?

change y by 2

next costume

wait 0.1 seconds

delete this clone

Click the green �ag and try drawing a line that slopes upwards. Check that your cat follows this line.



Step 6 Get to safety

The object of the game is to guide the cats to safety by creating a path so they can reach the door. Create a score

variable to keep track of how many cats reach the door.

Create a variable called score.



Add code to your cat sprite to add 1 to the score each time a cat reaches the door. Also set score to 0

when the flag is clicked at the start of the game.





show


move 10 steps


change y by -2

repeat until not touching color ?

change y by 2

next costume

wait 0.1 seconds

if touching Door ? then

change score by 1

delete this clone

when clicked

set score to 0



Add some more code so that, when a cat sprite reaches the door, the cat makes a ‘meow’ sound and

then disappears.

start sound meow

delete this clone



Challenge: more obstacles

At the moment, the game is rather easy to win. Can you think of ideas to you make your game harder?

Add more backgrounds with di�erent platform designs.

Move the location of the door depending on which background is displayed.

Add more sprites as moving obstacles. Perhaps you could have roaming dogs or rotating spikes the cats

need to avoid?

Only allow the player to use a limited amount of “ink” to draw lines in the game. You can keep track of how

much “ink” is used by creating a timer variable that records how long the mouse is held down.

Create a sprite to show the player how much ink is left.

Challenge!



Step 7 What next?

Try the Flower generator (https://projects.raspberrypi.org/en/projects/�ower-generator?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects) project, where you will use custom blocks to create

�ower patterns.


View project & license on GitHub (https://github.com/RaspberryPiLearning/cats)

https://projects.raspberrypi.org/en/projects/flower-generator?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects



https://github.com/RaspberryPiLearning/cats

26/05/2020 Flappy parrot | Raspberry Pi Projects

https://projects.raspberrypi.org/en/projects/flappy-parrot/print 1/20

Projects

Flappy parrot

Create a game in which you guide a parrot past

moving obstacles

Step 1 Introduction

Create a game in which you have to guide a parrot past scrolling pipes to score points.

What you will make

You will press the space bar to make the parrot �ap its wings, and score one point for every pipe that you manage to

get the parrot past.

What you will need

Hardware


Software

Scratch 3 (either online (https://rpf.io/scratchon) or o�ine (https://rpf.io/scratcho�))

https://rpf.io/scratchon

https://rpf.io/scratchoff



What you will learn

How to create sprites using Vector mode

How to use sounds

How to detect collisions

How to control a sprite using the keyboard


You can �nd the completed project here (https://rpf.io/p/en/�appy-parrot-get).

https://rpf.io/p/en/flappy-parrot-get



Step 2 Add the pipes

First, create the pipes.

The ‘Pipes’ sprite should be a pair of pipes with a gap in the middle. By moving the sprite up or down, you can put

the gap in a di�erent place.

This picture shows an example of how the pipes could be positioned. The parts of the sprite outside the Stage are

normally hidden, you only see then when you drag the sprite:

You can’t draw a sprite as big as the pipes need to be, but you can increase the size at which the sprite shows on

the Stage.

Open a new empty Scratch project.

Add a backdrop with an outdoor landscape. ‘Blue Sky’ is a good choice.

Create a new sprite and name it ‘Pipes’.



Add code to make the sprite bigger.

This makes it’s easier to see how big the pipes should be.

when clicked

set size to 200 %

Draw a rectangle for the top pipe as shown here:

Fill the pipe with a colour you like.



Create a duplicate of the pipe by selecting it and then clicking on Copy and Paste.

Drag the copy of the pipe to the bottom of the screen so that the copy is in line with the other pipe.

There needs to be a gap between the two pipes.



Challenge: make better pipes

Can you make your pipes look better?

Shade your pipes with a left-to-right gradient.

Add extra rectangles to the ends of the pipes:

Challenge!



Step 3 Make the pipes move

Next you’re going to make the pipes move across the screen to create an obstacle course.

First make the pipes appear by adding code to the Pipes sprite so that, when the green flag is

clicked, the sprite forever creates a clone of itself every two seconds.

Tip: clones are just copies of a sprite, and they are really useful for creating games.

when clicked

set size to 200 %

hide

forever


wait 2 seconds



Now you should have lots of pipes, but their gaps are always in the same place.

You can add some variety by using a random number for the Pipes sprite’s y position.

Next make the pipes move by adding code so that, when a clone starts, the clone appears on the

right side of the Stage and glides across to the left.

Tip: you can stop the pipes scrolling by clicking the red stop button next to the green �ag.


show

go to x: 240 y: 0

glide 4 secs to x: -240 y: 0

delete this clone



Modify your sprite’s code so that each sprite clone picks a random number from -80 to 80 and

glides to that y position:


show

go to x: 240 y: pick random -80 to 80

glide 4 secs to x: -240 y: y position

delete this clone



Step 4 Make Flappy fall

Now add a sprite called Flappy and create code it so Flappy falls down the Stage. In the next step, you will add the

code to make Flappy �y when you press a key.

Flappy needs to be smaller.

When the game starts, Flappy needs to be just left of the centre of the Stage, at coordinates -50, 0.

Add a new sprite that has two costumes, for ‘wings up’ and ‘wings down’, and name it Flappy.

The parrot sprite is a good choice.

Add code to set Flappy's size to 25% when the green flag is clicked.

when clicked

set size to 25 %



Add code to make Flappy go to the x and y starting position of x: -50 and y: 0.

when clicked

set size to 25 %

go to x: -50 y: 0

Now make Flappy keep falling down the Stage by forever changing the sprite's y position

by -3.

when clicked

set size to 25 %

go to x: -50 y: 0

forever

change y by -3

Test your code to make sure Flappy starts in the middle of the screen and falls to the bottom. When you

drag Flappy to the top of the Stage, the sprite should fall again.



Step 5 Make Flappy �y

Now you will make Flappy �ap upwards when you press the space bar. When you play the game, you have to time

your taps to get Flappy through the gaps in the pipes.

Make Flappy �y upwards when you tap the space bar.

Now you need to get Flappy’s wings �apping!

When the space key is pressed, Flappy should move upwards by changing its y coordinate

by a small amount, for example 6.

Flappy �ies upwards by repeating this movement 10 times.

Add this code to your Flappy sprite:


repeat 10

change y by 6

Click on the Costumes tab, and name Flappy’s costumes ‘wings up’ and ‘wings down’.



Can you make Flappy’s costume change to wings down when you press space, and then change it back

to wings up halfway through the upward movement?

Your code should look like this:


switch costume to wings down

repeat 5

change y by 6

switch costume to wings up

repeat 5

change y by 6

Test your code. As you see, at the moment nothing happens if you let Flappy hit a pipe.



Step 6 Detect collisions

To make the game a challenge, the player needs to guide Flappy through the gaps without letting the parrot touch

the pipes or the edges of the Stage. You need to add some blocks to detect when Flappy hits something.

This is called collision detection.

A wait until block is necessart to check whether Flappy is touching the pipes or touching the edge.

Next, update the code so that the game stops when Flappy hits a pipe.

Import a sound from the library that you want to play when Flappy collides with something. The ‘screech’

sound is a good choice.

Add a new when green flag clicked block to the ‘Flappy’ sprite, and also add the following code:

when clicked

wait until touching Pipes ? or touching edge ?

start sound screech

Test your code. If Flappy touches a pipe, the ‘screech’ sound should play.



Add the following code to stop the game after a collision is detected:

The broadcast block tells other sprites that the game is over.

The stop block stops other Flappy scripts that are running so that Flappy stops falling after a collision.

when clicked

wait until touching Pipes ? or touching edge ?

start sound screech

say Game Over!

broadcast Game Over

stop other scripts in sprite

Finally, add the following code to the Pipes sprite so that pipes stop appearing when the sprite

receives Game Over.

when I receive Game Over

stop other scripts in sprite

Test your game and see how long you can play before it’s ‘Game over’!



Step 7 Add a score

The player should score a point every time Flappy makes it through a gap between pipes.

Each ‘Pipes’ sprite clone should wait until Flappy has �own past and then increase the score.

Make a new variable for all sprites and call it score.

First, set score to 0 when the game begins:

when clicked

set score to 0

set size to 200 %

hide

forever


wait 2 seconds



Then add the following code to the Pipes sprite:


wait until

Add more code so that, when Flappy’s x position is greater than the pipe clone’s x position, the score

increases by 1 and a sound of your choice plays.

You could use the ‘pop’ sound if you want, or add a sound from the library, for example ‘bird’.

Your code should look like this:


wait until x position of Flappy > x position

change score by 1

start sound pop

Test your code and make sure you score a point every time Flappy gets through a gap between pipes.

Check whether the score is set to 0 when you start a new game.



Challenge: adjust the di�culty

Is the game too hard or too easy for you? How many ways can you �nd to change the di�culty?

Adjust the game until you are happy with its di�culty!

Challenge!



Challenge: add a high score

Can you add a high score to the game so that, in addition to keeping track of score for the current round, it keeps

track of the highest score you’ve ever reached?

Challenge!



Step 8 What next?

Try the Binary hero (https://projects.raspberrypi.org/en/projects/binary-hero?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects) project, where you will make a game in which you play the

notes of a song as they scroll down the Stage.

The notes will fall from above, and you will have to press keys to “catch” and play the notes.


View project & license on GitHub (https://github.com/RaspberryPiLearning/�appy-parrot)

https://projects.raspberrypi.org/en/projects/binary-hero?utm_source=pathway&utm_medium=whatnext&utm_campaign=projects



https://github.com/RaspberryPiLearning/flappy-parrot

Documents

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