Just follow the instrunctions in the game. If you do it right, the flat thing should look like it's twisting(ish). It works best on wood, but almost any flat thing will work(that includes the screen!). Remember not to look at any other part of the thing than the part that was in the circle. Credit to simpson100 for part of the twisty thing. http://scratch.mit.edu/projects/simpson100/914039
