Algodoo

Clever and impressive coding.
Excellent work, overall.

Thanks Xray.

Although my English is pretty poor,Iwant to leave a comment to express my gratitude! I have always wanted to make a scene to prove the law,but I'm not good at writing code.Your work provides a great way to accomplish it.

Thanks for the comment. I liked your idea and the creative way you solved the problem of showing it. I was a little concerned that you might feel bad that I stole your idea, but then I rationalized that it was Kepler's idea to begin with. They say that imitation is the sincerest form of flattery. I've subscribed to your scenes so I will keeping my eye on you. Feel free to use anything from any of my scenes.

Thank you!
Not only for your enlightenment,but also for your kindness!