twist the knobs to move the drawing thing left right up and down or also use arrow keys. press space to clear. have fun! Now when you press space it looks like you shake it! I think that this is a very realistic version of the etch-a-sketch. [oh my gosh what if there was a 3-D etch-a-sketch!] Eh, I just added two "(() - (90))" blocks, to fix the clearing. that's all.
