“folding paper,”

In origami, the same simple concepts yield everything from a paper crane with about 20 steps,to this dragon with over 1,000 steps,to a starshade.A single, traditionally square sheet of paper can be transformed into almost any shape, purely by folding.Unfold that sheet,and there’s a pattern of lines,each of which represents a concave valley fold or a convex mountain fold.Origami artists arrange these folds to create crease patterns,which serve as blueprints for their designs.