# 悟空想海龟作图画出弹簧隧道，但是出现了bug，运行不了，请你帮助他，修改bug~
import turtle 

pen=turtle.Pen()
screen=turtle.Screen()
pen.speed()
pen.hideturtle()
screen.bgcolor('black')

i=0
while i<135:
    pen.pencolor('pink')
    pen.penup()
    pen.goto(0,0)
    pen.forward(200)
    pen.pendown()
    pen.circle(100)
    pen.left(2)
    i+=1

turtle.done()