A tool to evaluate and draw L-system.
For information about L-systems you can read the Wikipedia article.
This implementations allows every ASCII character to be a variable.
Multiple rules can be given by placing each rule on its own line.
Predecessor and successor of a rule must be separated by ->.
When drawing the result, some variables have a special meaning:
0,1,F,A,Bdraw a line segment[saves the current position and rotation onto thr stack]pops position and rotation from the stack and updates the current values accordingly+and-perform a rotation in clock- and counterclockwise direction