Iterates L-systems. There's no text wrap, so strings extend offscreen.
I'm going to try adding a turtle graphics function that appears over the top of the text that you can press z to toggle on/off.
Simulates algae by default, but you can easily change the system by editing the variable and varprod tables.
If you want to add a constant, just make the corresponding varprod the same character as the variable.
EDIT:
Don't press x to iterate, press z. i made a typo.

P#37924 2017-02-28 08:11 ( Edited 2017-02-28 14:20)