song -用函数画彩虹

import turtle


# 专业术语：函数
def mo_mo_(jishu):
    turtle.speed(0)
    turtle.lt(90)
    turtle.color("purple")
    turtle.pensize(jishu)
    turtle.circle(jishu,180)
    turtle.lt(-90)
    turtle.fd(jishu)
    turtle.lt(270)
    turtle.color("blue")
    turtle.pensize(jishu)
    turtle.circle(-2*jishu,180)
    turtle.lt(90)
    turtle.fd(jishu)
    turtle.lt(-270)
    turtle.color("cyan")
    turtle.pensize(jishu)
    turtle.circle(3*jishu, 180)
    turtle.lt(-90)
    turtle.fd(jishu)
    turtle.lt(270)
    turtle.color("green")
    turtle.pensize(jishu)
    turtle.circle(-4*jishu, 180)
    turtle.lt(90)
    turtle.fd(jishu)
    turtle.lt(-270)
    turtle.color("yellow")
    turtle.pensize(jishu)
    turtle.circle(5*jishu, 180)
    turtle.lt(-90)
    turtle.fd(jishu)
    turtle.lt(270)
    turtle.color("orange")
    turtle.pensize(jishu)
    turtle.circle(-6*jishu, 180)
    turtle.lt(90)
    turtle.fd(jishu)
    turtle.lt(-270)
    turtle.color("red")
    turtle.pensize(jishu)
    turtle.circle(7*jishu, 180)
# mo_mo()
# turtle.done()