In this part, I take reference from:
This section will deal with the Lindemayer systems or L-system introduced and developed in 1968 by the Hungarian theoretical biologist Lindenmayer. A L-System is a set of rules and symbols used to to model the growth processes of plant development, but also able to model the morphology of a variety of organisms. The main concept in L-Systems is “rewriting rules”. This technic is used to replace some initial condition using some rules to do the replacement.