Python：雪花绘制

#Python：雪花绘制

# 函数递归.绘制雪花
import turtle
def snow(n,a):
    if n==0:
        turtle.fd(a)
    else:
        for angle in [0,60,-120,60]:
            turtle.left(angle)
            snow(n-1,a/3)
turtle.setup(800,600)
turtle.speed(1000)
turtle.penup()
turtle.goto(-200,100)
turtle.pendown()
turtle.pensize(2)
snow(3,400)
turtle.right(120)
snow(3,400)
turtle.right(120)
snow(3,400)
turtle.done()

运行效果：