You might have to click the green flag a few times to get a good triangle (the points are chosen randomly, and often form a very cramped triangle). Be sure to shift click on the green flag for turbo mode! Three sides and a factor of 50 produces a Sierpinski Triangle. You can play around with other numbers, but 3 sides and factor of 50 are the only ones that work well. Click the green flag again after changing the variables to see your changes go into effect.
Uses the "chaos game" method: http://en.wikipedia.org/wiki/Chaos_game
