TURBOWARP RECOMMENDED (although it will lag even on turbowarp): https://turbowarp.org/1322276348 Press green flag to generate a new gradient Left click to zoom in
I used an optimisation, that I found on reddit: "It can be shown that if a solid shape can be drawn on the Mandelbrot set, with all the border colors being the same, then the shape can be filled in with that color. This is a result of the Mandelbrot set being simply connected"