Axiom:  -(90)F(1) 
context().turtle.setAngleIncrement(90)
dl = 0.0
dt = 0.0
derivation length: 3
production:

F(x) --> F(x*(1-dl)+dt) +(45) F(2*dl)+(45) F(x) - F(x -2*dt) - F(x) -(45) F(2*dl) -(45) ,(2+getIterationNb()) F(x-2*dl -2*dt),(1) +(45)F(2*dl)+(45) F(x)  + F(x -2 *dt) + F(x) -(45) F(2*dl) -(45) F(x+dt)




interpretation:


endlsystem
###### INITIALISATION ######

__lpy_code_version__ = 1.1

def __initialiseContext__(context):
	import openalea.plantgl.all as pgl
	Color_1 = pgl.Material("Color_1" , ambient = (0,0,0) , diffuse = 3 , )
	Color_1.name = "Color_1"
	context.turtle.setMaterial(1,Color_1)
	Color_3 = pgl.Material("Color_3" , ambient = (175,0,0) , diffuse = 1.02857 , )
	Color_3.name = "Color_3"
	context.turtle.setMaterial(3,Color_3)
