Warning, very bad graphical quality ahead!
You're sure you want to see it?
You've been warned. I take no responsibility for where your eyes go.
I've gotta say that all we (a really talented buddy of mine and me) had for doing this was a realtime collaborative drawing tool with no more than 6 default hard brushes (differing in size only) and 13 eyecancer-provoking colors. And a lack of Undo function.