python:彩色小蛇

代码如下

import turtle
def drawSnake(rad,angle,len,neckrad):
for i in range(len):
turtle.pencolor("red")
turtle.circle(rad,angle)
turtle.pencolor("blue")
turtle.circle(-rad,angle)
turtle.pencolor("black")
turtle.circle(rad,angle/2)
turtle.fd(rad)
turtle.circle(15,180)
turtle.fd(rad*2/3)
turtle.exitonclick()
def main():
turtle.setup(1300,800,0,0)
pythonsize = 30
turtle.pensize(pythonsize)
turtle.pencolor("red")
turtle.seth(-40)
drawSnake(50,80,2,pythonsize/2)
main()

说明：没有实现每一段都是不同的颜色，因为上述的代码中的循环语句没想到好的处理方式。大致效果如何。