Inspired by this post (and following through on this comment), I've written a Mastodon bot that creates procedural bitmap art. It works by first creating a simple function consisting of randomly chosen integer operations. This is applied to each pair of pixel coordinates and used to colour them. The bot then toots both the picture and the function. Source code for the renderer is here; the bot code will likely get released as well when I get around to it.
Benoit Mandelbot is a Mastodon bot that periodically toots a random, usually interesting and occasionally stunning image from around the Mandelbrot Set. The images are visible to non-subscribers so you can look at them even if you don't do Mastodon.