The author discusses the concept of Lindemayer systems or LSystems, which consist of symbols that can be used to create strings and geometric structures. The author mentions building a website to generate LSystems using JavaScript in the past but now wants to explore rebuilding it with Rust for better performance. They then provide an example of defining and generating the sequence for a Barnsley Fern fractal using Rust. The author explains how each character in the sequence corresponds to drawing operations on a canvas, and then discusses coloring the canvas using a linear gradient. They also provide examples of other fractals that can be generated using LSystems.
https://vsekar.me/blog/log_coffee/chapter_0.html