Thank you I know what l systems are. A Semi-Thue grammar which is not really a Chomsky grammar - the way the production rules are applied differs. They are after the name of famous biologist called Lindenmayer, thus the name. I’ve been teaching these.

Now my question was - is this an L-system or another one. Not what are L-systems which are. As far as I get from your reply, the plug-in does not facilitate. Thanks.