Fractal
geometric shapes, Patterns, etc. that are Self Similar across scales?
 cf Congruent
http://en.wikipedia.org/wiki/Fractal
http://www.fractalus.com/info/layman.htm
http://archive.ncsa.uiuc.edu/Edu/Fractal/Fractal_Home.html  The Fractal Microscope: A Distributed Computing Approach to Mathematics in Education
associated with Benoit Mandelbrot
Python coding?

another also using simify?

another PIL example for Sierpinski Triangle
cf Fractally Open Society, Fractally Generative Pattern Language, Generative
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