关于python:圣诞树python

import turtle as t
from turtle import *
import random as r
import time
n = 100
speed(“fastest”)
pensize(5)
screensize(bg=’pink’)
left(90)
forward(3*n)
t.colormode(255)
t.pencolor(253,141,144)
t.write(” Happy Festival”,align =”center”,font=(“MV Boli”,60,”bold”))
color(“orange”, “yellow”)
begin_fill()
left(126)
for i in range(5):

forward(n/5)
right(144)   
forward(n/5)
left(72)    

end_fill()
right(126)
def drawlight():

if r.randint(0, 20) == 0:
    color('tomato')
    circle(6)
elif r.randint(0,20) == 1:
    color('orange')
    circle(3)
else:
    color('purple')
    color("dark green")

backward(n*4.8)
def tree(d, s):# 开始画树

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

tree(15, n)
backward(n/2)
for i in range(300):

a = 200 - 400 * r.random()
b = 10 - 20 * r.random()
up()
forward(b)
left(90)
forward(a)
down()
if r.randint(0, 1) == 0:
        color('tomato')
else:
    color('wheat')
circle(2)
up()
backward(a)
right(90)
backward(b)
t.color("dark red","red")

t.write(” Merry Christmas”,align =”center”,font=(“Comic Sans MS”,20,”bold”))
def drawsnow():# 农产品期货定义画雪花的办法

t.ht()  
t.pensize(5)  
for i in range(400): 
    t.pencolor("white")
    t.pu() 
    t.setx(r.randint(-550,550)) 
    t.sety(r.randint(-100,350)) 
    t.pd() 
    dens = 6 
    snowsize = r.randint(1,10) 
    for j in range(dens): 
        t.fd(int(snowsize))
        t.backward(int(snowsize))
        #t.bd(int(snowsize))  
        t.right(int(360/dens))  

drawsnow()# 调用画雪花的办法
time.sleep(60)
t.exitonclick()