2018没见下雪，那就用Python画一片雪花吧

画雪花代码：

import turtle
from turtle import *
def koch(size, n):
    if n == 0:
       turtle.fd(size)
    else:
        for angle in [0, 60, -120, 60]:
            turtle.left(angle)
            koch(size / 3, n - 1)
def main():
    turtle.setup(600,600)
    turtle.pen(speed = 0, pencolor = 'red')
    turtle.penup()
    turtle.goto(-200,100)
    turtle.pendown()
    turtle.pensize(1)
    level = 5
    koch(400,level)
    turtle.right(120)
    koch(400, level)
    turtle.right(120)
    koch(400, level)
    turtle.hideturtle()
    done()
main()

结果：

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