I wrote a tutorial on generating fractals with L-systems: https://t.co/BiBXgYHw59. Here's my AxiDraw plotting a tree. pic.twitter.com/JG3UkMZORz

— Paul Butler (@paulgb) July 9, 2017

Paul Butler wrote a tutorial on Fractal Generation with L-Systems and posted some example code with the output plotted by AxiDraw.

The tutorial is also available as a Jupyter notebook with runnable code.