If anyone wants to do generative art type stuff over the weekend I've merged my L-system code into the core of ergo and have added support for cellular automata, though I'm still developing that part of the library. https://github.com/decomplect/ion/blob/master/src/ion/ergo/core.cljc

I've used it to render fractals into a canvas in devcards, and to do Conway's Game of Life into a canvas in a custom app.

I'm planning to render to Alda, the music language, when I get around to it.