Here's an update for Lindenmayer power! I've rewritten the whole thing and switched from simple context-free grammars to stochastic context-free grammars. The turtle commands have been streamlined and I've also added some new commands. Now you can change the colour of the lines, their thickness and you draw little squares and text.
Link --> http://madflame991.blogspot.ro/p/lindenmayer-power.html