Jonathan Leech's (leech@cs.unc.edu) excellent L-system software program (for unix) was used to interpret L-systems axioms and production rules into  strings which could then be interpreted using turtle graphics to produce images (as postscript files).

This program produces midi files from a string input (output file from lsys). This was originally written in 1998 as a a student project by Leigh Goodall and Matthew Watson using Jacques Soddell as a client and supervised by Fran Soddell and Lorraine Staehr. The program was rewritten by Fran Soddell in January 2000 to alter the mapping of lsys strings to midi events to more closely represent the growth of filamentous microbes.