final int alpha = 90;
final float factor = 1 / 3.0;

protected void init ()
[
	Axiom ==> F(2);
]

public void run ()
[
// F ==> F-F+F+F+F-F-F-F+F

	F(x) ==> F(factor*x) RU(-alpha) F(factor*x) RU(alpha) F(factor*x) 
			 RU(alpha) F(factor*x) RU(alpha) F(factor*x) 
			 RU(-alpha) F(factor*x) RU(-alpha) F(factor*x) 
			 RU(-alpha) F(factor*x) RU(alpha) F(factor*x);
]