Green flag, use turbo. Unfortunately, there are glitches on the outside-values coming over 100%, I don't know why. It's only about a margin of 15%, but that is still annoying. That's why I had to have that boolean at the end of the calculation bit. You can change the size and pen size. Don't interact with the trig bit, it's the x changes and pen size formula. The second one I can't use, but it looks amazing. You can see the glitched areas where a region ends up the same colour, like in the corners. Use turbo mode for this mode, otherwise it will take a very long time. It's basically a gradient. Note that the pure colour comes exactly at the 1/4 radius at vertical and/or horizontal axis's
Most of this came from knowledge of the curvature project This is for a poster concerning maths. It has to be black and white, though. I did create a second one, but with colours Messing around with the trig functions, I see how insane they are. Go inside and mess around with them-I encourage you to do that