# pst-lsystem: creating images defined by a L-system: A L-system or Lindenmayer system is a parallel rewriting system and a type of formal grammar. An L-system consists of an alphabet of symbols that can be used to make strings, a collection of production rules that expand each symbol into some larger string of symbols, an initial »axiom« string from which to begin construction, and a mechanism for translating the generated strings into geometric structures. Save the files pst-lsystem.sty|pro|tex in a directory, which is part of your local TeX tree. The pro file should go into $TEXMF/dvips/pstricks/ Then do not forget to run texhash to update this tree. pst-lsystem needs pstricks, which should be part of your local TeX installation, otherwise get it from a CTAN server, http://mirror.ctan.org PSTricks is PostScript Tricks, the documentation cannot be run with pdftex, use the sequence latex->dvips->ps2pdf or pdflatex with package auto-pst-pdf or xelatex. %% This program can be redistributed and/or modified under the terms %% of the LaTeX Project Public License Distributed from CTAN archives %% in directory macros/latex/base/lppl.txt. %% $Id: README.md 819 2018-09-26 06:40:48Z herbert $