The L-system simulation is a tool that parses axioms and rules to run a simulation based on the given parameters. Users can select pre-filled shapes from the Preset selector at the bottom of the tool. The simulation starts with an initial statement called the axiom, and then follows a sequence of replacement rules. The initial angle determines the starting direction of the drawing pen in degrees, with 180 setting it to point upwards. The angle change parameter determines the degrees for each turn command, and the scale multiplier determines the length multiplier for each recursive step. Users can also adjust the simulation depth to specify how many recursion steps to perform.
https://eliben.github.io/lsystem/