Black within and red without;Four corners around about.

I am behind something tall and thin,I welcome you when you come in, what am I?

I have a head but never weep,I have a foot but never walk,You come to me if you want to sleep.

Boats sail the high seas in me,But not a man is lost at sea!My shores are shiny and slick,But my waters won’t make you sick!

Your artwork shines within my glow.I hold other good things you know!Your mother says to close me up—Look up high, if you are stuck!