turtleライブラリで蛇を描く--python

 
  
import turtle
turtle.setup(650,350,200,200)
#width, height, startx, starty
turtle.penup()
#    
turtle.fd(-250)
#fd            ，bk     
turtle.pendown()
#    
turtle.pensize(25)
#     ，     
turtle.pencolor("purple")
turtle.seth(-40)
#         ，angle     
for i in range(4):
    turtle.circle(40,80)
    #        (r,angle)
    turtle.circle(-40,80)
turtle.circle(40,80/2)
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40 *2/3)
turtle.done()