#!/usr/bin/env python3
# -*- coding: utf-8 -*-#画雪
from turtle import *
from random import *   def ground():hideturtle()speed(100)for i in range(400):pensize(randint(5,10)) #画笔大小随机x = randint(-400,350)y = randint(-280,-1)r = -y/280 #<1的随机值g = -y/280 #<1的随机值b = -y/280 #<1的随机值
        pencolor((r, g, b))penup()goto(x,y)pendown()forward(randint(40,100)) #随机画40 - 100 的线条def snow():    hideturtle()pensize(2)speed(100)for i in range(100):r = random() #随机值g = random() #随机值b = random() #随机值
        pencolor(r, g, b)penup()setx(randint(-350,350)) sety(randint(1,270))pendown()dens = randint(8,12)snowsize = randint(10,14)for j in range(dens):forward(snowsize) #前进backward(snowsize) #后退right(360/dens) #旋转角度def main():setup(800, 600, 0, 0) #设置画布大小tracer(False) #不显示动画bgcolor("black")    snow()ground()tracer(True)mainloop()if __name__ == "__main__":main()

#!/usr/bin/env python3
# -*- coding: utf-8 -*-#画彩虹
from turtle import *def HSB2RGB(hues):hues = hues * 3.59 #100转成359范围rgb=[0.0,0.0,0.0]i = int(hues/60)%6f = hues/60 -iif i == 0:rgb[0] = 1; rgb[1] = f; rgb[2] = 0elif i == 1:rgb[0] = 1-f; rgb[1] = 1; rgb[2] = 0elif i == 2:rgb[0] = 0; rgb[1] = 1; rgb[2] = felif i == 3:rgb[0] = 0; rgb[1] = 1-f; rgb[2] = 1elif i == 4:rgb[0] = f; rgb[1] = 0; rgb[2] = 1elif i == 5:rgb[0] = 1; rgb[1] = 0; rgb[2] = 1-freturn rgbdef rainbow():hues = 0.0color(1,0,0)#绘制彩虹
    hideturtle()speed(100)pensize(3)penup()goto(-400,-300)pendown()right(110)for i in range (100):circle(1000)right(0.13)hues = hues + 1rgb = HSB2RGB(hues)color(rgb[0],rgb[1],rgb[2])    penup()def main():setup(800, 600, 0, 0)bgcolor((0.8, 0.8, 1.0))tracer(False)rainbow()#输出文字
    tracer(False)goto(100,-100)pendown()color("red")write("Rainbow",align="center",font=("Script MT Bold", 80, "bold"))tracer(True)mainloop()if __name__ == "__main__":main()