Interesting to note that the author, LucasVB, uses a custom PHP library using GD to make these animations. He explains why he finds alternatives like Processin

Interesting to note that the author, LucasVB, uses a custom PHP library using GD to make these animations. He explains why he finds alternatives like Processing, Matplotlib, etc. insufficient here: http://1ucasvb.tumblr.com/faq http://1ucasvb.tumblr.com/faq