import turtle

t = turtle.Turtle()
t.left(90)

# def hexagon(n):
#     for i in range(n):
#         turtle.right(120)
#         turtle.forward(200)   
# hexagon(6)

# def stair(n):
#     if n <= 0:
#         return
#     t.forward(20)
#     t.left(90)
#     t.forward(20)
#     t.right(90)
    
#     stair(n - 1)

# t.speed(10)
# stair(100)
# turtle.done()

def baum(n):
    if n < 0:
        return
    
    t.forward(n / 3)
    t.left(30)
    baum(n - 10)
    t.right(60)
    baum(n - 10)
    t.left(30)
    t.backward(n / 3)

turtle.tracer(False)
turtle.speed(0)
baum(150)
turtle.update()
turtle.done()