Gesture Prototyping Tool
This tool lets you use the arrow keys on a MaKey MaKey and a pencil and paper to prototype gestures like "swiping" "pinching" and non-traditional gestures of all sorts.
Edit the targe list to be the sequence you want (up, left, down and right corespond to 1, 2, 3, and 4). It can be of any length including repeated numbers.
Then draw an appropriate shape on paper with pencil and alligator clip the makey makey to the different lines