turtle_fractal_tree

from turtle import forward, back, left, right
length = 200
left(90)
def tree(length):
    forward(length)
    if length > 10:
        left(45)
        tree(0.5*length)
        right(90)
        tree(0.5*length)
        left(45)
    back(length)
for i in range(5):
    tree(length)
    right(72)