Modular Origami 1 Module Creation Fold the rectangle in half Fold it in half horizontally and bring back to its original place. Fold the upper edge along the perforated line for both sides. Turn this piece over to the other side. Fold the left- most and right-most corners of the excessive edges toward the base line of the triangle. Fold the two excessive edges over, so that the whole piece becomes a triangle. Fold the right side over to the left side, so that it becomes even a smaller rectangle
