python turtle海龟画图

from turtle import *
from random import *

def ground():
hideturtle()
speed(0.5)
for i in range(105):
pensize(randint(4,9))
x=randint(-399,349)
y=randint(-278,0)
r=-y/278
g=-y/278
b=-y/278
pencolor(r,g,b)
penup()
goto(x,y)
pendown()
forward(randint(40,100))

def snow():
hideturtle()
speed(0.5)
pensize(2.3)
for i in range(88):
r=1
g=1
b=1
pencolor(r,g,b)
penup()
setx(randint(-350,350))
sety(randint(1,270))
pendown()
dens=randint(8,12)
snow_size=randint(10,14)
for j in range(dens):
forward(snow_size)
backward(snow_size)
right(360/dens)

def main():
setup(800, 600, 0, 0)
tracer(False)
bgcolor(“black”)
ground()
snow()
tracer(True)
mainloop()
main()

运行结果