This is a small toy that I wrote which can generate animations like the ones above. The program was created using the Common Lisp compiler from LispWorks and utilizes Zach Beane's Skippy library to create GIFs.
Note: The program works fine on Windows 7, but there have been some issues with Windows 8. Let me know if you have any problems.
You can download it from
You are free to use this software for private or educational purposes.
(But you are of course using it at your own risk.) However, redistribution of any kind is not allowed without
If you want to give this program to someone else, point them to the
original download location