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This is a famous fractal in mathematics, named after Benoit B. Mandelbrot.
It is based on a complex number equation (zn+1 = zn2 + c) which is repeated until it:
- diverges to infinity, where a color is chosen based on how fast it diverges
- does not diverge, and forms the actual Mandelbrot Set, shown as black
Original developed by Christian Stigen Larsen 2012
Modified by Rod Pierce 2018