- What it is:
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Start with any rectangle. Divide it into a 3 x 3 grid of equal-sized rectangles. Remove the middle one. Repeat this process on each of the remaining eight rectangles, ad infinitum.
Or take the additive approach: Start with a single 1-unit tile. Replace it with a square of eight 1-unit tiles surrounding an empty square. Repeat on each of the eight new tiles, and so on...
- Why?
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Implementing the above looked like an interesting way to learn some Common Lisp.
- Common Lisp code to make Sierpinski Carpets:
