圣诞树粒子代码python

以下是一个用Python绘制圣诞树的粒子代码示例：

import turtle as t
import random

def tree(d, s):
    if d <= 0:
        return t.forward(s)
    tree(d - 1, s * .8)
    t.right(120)
    tree(d - 3, s * .5)
    t.right(120)
    tree(d - 3, s * .5)
    t.right(120)
    t.backward(s)

def draw_tree():
    t.speed(0)
    t.left(90)
    t.up()
    t.backward(150)
    t.down()
    t.color('green')
    tree(7, 100)
    t.mainloop()

def draw_falling_leaves():
    t.speed(0)
    t.hideturtle()
    t.up()
    t.setpos(0, -200)
    t.down()
    for i in range(200):
        a = 200 - 400 * random.random()
        b = 10 - 20 * random.random()
        t.up()
        t.forward(b)
        t.left(90)
        t.forward(a)
        t.down()
        if random.randint(0, 1) == 0:
            t.color('tomato')
        else:
            t.color('wheat')
        t.circle(2)
        t.up()
        t.backward(a)
        t.right(90)
        t.backward(b)
    t.mainloop()

draw_tree()
draw_falling_leaves()