"Fragmon" - Graph of a function, inspired by the search of a function, continuous on a fixed interval and monotonic on no interval. If one repeated calculations for an infinite time, would this function match the previous description?
Julia sets - Type in the real and imaginary parts of a complex number, preferably between -1 and 1.
Mandelbrot set -
Watch the Mandelbrot set appear, taking your mouse on the grey picture. That is not to make the program fun or whatever, but it is a good way I found to point the computer's calculations on interesting regions only.
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