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#
# Code under the MIT license by Alexander Pruss
#
import lsystem
from mcturtle import *
t = Turtle()
t.pendelay(0)
t.turtle(None)
t.penblock(BRICK_BLOCK)
t.gridalign()
# http://mathforum.org/advanced/robertd/lsys2d.html
rules = { 'X': 'XF-F+F-XF+F+XF-F+F-X' }
def go():
t.startface()
for i in range(4):
t.go(4)
t.pitch(90)
t.endface()
t.go(4)
dictionary = {
'F': go,
'+': lambda: t.yaw(90),
'-': lambda: t.yaw(-90),
}
lsystem.lsystem('X', rules, dictionary, 4)
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