I wrote a very similar tool for myself a long time ago: “wd” or Working Directory. Uses similar numeric slots but also has named “schemes” and sets environment variables for your slots for you.
Always fun to see an interactive L-System implementation!
This one seemed to have odd line weights to me... until I realized that the default F-Reproduction value seems to have a bug: I think it's supposed to be "F[-F]F[+F]F" instead of "F[-F]F[+F][F]"?
I wrote a very similar tool for myself a long time ago: “wd” or Working Directory. Uses similar numeric slots but also has named “schemes” and sets environment variables for your slots for you.
https://github.com/karlin/working-directory