Lavaurs algorithm



Hi,

Here is my lisp code and image 

http://commons.wikimedia.org/wiki/File:Lavaurs-12.png

Here is description :
http://en.wikibooks.org/wiki/Fractals/Iterations_in_the_complex_plane/
Mandelbrot_set/lavaurs

It is based on lisp code by R Berenguel : 
http://www.mostlymaths.net/2009/08/lavaurs-algorithm.html


Comments are wellcome, especially how to improve program.
I'm working on SVG version
It should be easy to use it with Maxima.

Regards

Adam