Currently working on a lispy python dialect (python-compatible, with lispy macros). Will be published soon.

Here's a project that makes use of it (PixelStruct):

http://da.vidr.cc/projects/pixelstruct/

See also:

http://en.wikipedia.org/wiki/Langtons_loops

http://en.wikipedia.org/wiki/Wireworld

Here is the description from the creator's blog: http://lbrandy.com/blog/2009/04/genetic-algorithms-evolving-...

more music libraries or languages:

JFugue: http://www.jfugue.org/

mingus: http://code.google.com/p/mingus/

OpenMusic: http://en.wikipedia.org/wiki/OpenMusic

Strasheela: http://strasheela.sourceforge.net/strasheela/doc/index.html

Common Music: http://commonmusic.sourceforge.net/

other "music programming languages": http://www.nosuch.com/plum/cgi/showlist.cgi?sort=name&co...

Another interesting site concerning visualization of patterns in prime numbers:

http://www.divisorplot.com/

http://www.divisorplot.com/6.html -- the Ulam spiral

Here are a few links that give slightly more information:

http://aqua-velvet.com/2010/09/lesquatrestacions-the-four-se...

http://minimalismi.net/photo/lesquatrestacions

http://datavisualization.ch/showcases/motstudio