I thought there was a thread, but searching "Sketch" in the forum search bar brought nothing up, so here it is. Unless someone says some smartass comment and links the other thread that I think exists somewhere. In which case, use it.
http://sketchtoy.com/66415339
http://sketchtoy.com/66415339
TheFlyingFishy said:http://sketchtoy.com/66415234
http://sketchtoy.com/66415270
This is fun.
Hard to do with a laptop touchpad, though.