Free · Nature and fractals

L-System Rule Explorer

Change one short rule and watch straight lines turn into surprising art.

  • Clear, kid-friendly steps
  • Private in your browser
  • No signup

Growing rules

Repeat one rule to grow art

Rule-grown art

1,249 drawing commands

Powered by Lindenmayer, an open-source library available under MIT.

Three simple steps

How to use it

  1. Move the simple sliders or pick new colors.
  2. Make a new picture and see how it changes.
  3. Save your favorite creation or copy its pattern code.

Private by default

Your words and choices stay in this browser tab. There are no accounts, uploads, ads, or trackers inside the tool. Close the tab and the working data is gone.