Algodoo

A simple robotic arm that I just put together. I had to cheat a bit in order to make it work. It will start moving at once something comes near the middle of the black cross. I will then move over, and drop the ball on the little platfor. Each time the ball hits the platform the arm have done one round. Enjoy, and please give me tips about oncollide scripting.
PS Mark the whole area, and make everything become visible. That way you'll easily see what i did to make it work.