'''
Drawing a Tree Fractal
'''

import turtle

def draw_tree(t, depth, size):

    if depth <= 0:
        return

    if depth == 1:
        t.color("green")
    else:
        t.color("brown")

    t.forward(size)
    t.left(40)
    t.forward(size)

    draw_tree(t, depth - 1, size)

    t.back(size)
    t.right(80)
    t.forward(size)

    draw_tree(t, depth - 1, size)

    t.back(size)
    t.left(40)
    t.back(size)




# depth tells how many cycle of trees
#     if depth == 0:
#         return

    # t.forward(size)
    # t.left(40)
    # t.forward(size)
    #######
    # draw_tree(t, depth-1, size)
    # t.forward(size)
    # t.left(40)
    # t.forward(size)
    # t.back(size)
    # t.right(40 * 2)
    # t.forward(size)
    # t.back(size)
    # t.left(40)
    # t.back(size)
    #######

    # t.back(size)
    # t.right(40*2)
    # t.forward(size)
    # #######
    # draw_tree(t, depth-1, size)
    # t.forward(size)
    # t.left(40)
    # t.forward(size)
    # t.back(size)
    # t.right(40 * 2)
    # t.forward(size)
    # t.back(size)
    # t.left(40)
    # t.back(size)
    #######

    # t.back(size)
    # t.left(40)
    # t.back(size)




tom = turtle.Turtle()
tom.speed("slow")

tom.left(90)
tom.penup()
tom.back(150)
tom.pendown()

draw_tree(tom, 3, 50)

turtle.done()