Mandelbrot set
Got bored, had time on my hands. It's very slow, but gets the job done, by zooming in on the Mandelbrot set. You can change the coordinates and how fast it goes by changing the coordinates variable and the multiplier variable, respectively. Here's a screenshot:
Links
https://en.wikipedia.org/wiki/Mandelbrot_set
https://www.codingame.com/playgrounds/2358/how-to-plot-the-mandelbrot-set