# L-Systems An L-System is an allgorithm that rewrites strings of text over and over again using predetermined rules. ## Alphabet The set of all characters that are allowed in an L-System. *Example:* - **[A,B]** ## Axiom The initial text the L-System starts out with, for *Example* - **A** ## Rule set The rules that are applied in each generation to the text. *Example:* - **A** becomes **ABA** - **B** becomes **BBB**