At this point of the book users only have been doing in 2D space.
This chapters come just after fractal brownian motion so it should start by build on the concept of iteration and self similarity.

Added like 8 examples as a skeleton for it.

Curate and edit them.

Then from there the idea is to introduce mathematical elements that builds into Julia and Mandelbrot sets.

Along the way is always good to reference artist and/or natural phenomenas where this concepts are represented.