1. import turtle
    3. # 定义圣诞树的绿叶函数
    4. def tree(d, s):
    5.     if d <= 0:
    6.         return
    7.     turtle.forward(s)
    8.     tree(d - 1, s * .8)
    9.     turtle.right(120)
    10.     tree(d - 3, s * .5)
    11.     turtle.right(120)
    12.     tree(d - 3, s * .5)
    13.     turtle.right(120)
    14.     turtle.backward(s)
    15. n = 100
    17. turtle.speed('fastest') # 设置速度
    19. turtle.left(90)
    20. turtle.forward(3 * n)
    21. turtle.color("orange", "yellow")
    22. turtle.left(126)
    24. # turtle.begin_fill()
    25. for i in range(5):
    26.     turtle.forward(n / 5)
    27.     turtle.right(144)
    28.     turtle.forward(n / 5)
    29.     turtle.left(72)
    30.     turtle.end_fill()
    31. turtle.right(126)
    32. turtle.color("dark green")
    33. turtle.backward(n * 4.8)
    35. # 执行函数
    36. tree(15, n)
    37. turtle.backward(n / 5)