<SPACE> = Clear pen. <CLICK> = Pen down. Just a super basic pen program. Straightforward enough. Don't throw tomatoes at me yet, just practicing programming using pen commands.
I saw this cool Scratch cloud thing that wasn't there when I first started out (like, five years ago. Yeesh, I feel like a geezer.) I might continue with a "multiplayer" drawing board, so people can see each others' drawings.