James Yang -畫彩虹（未完待續）

import turtle
turtle.screensize(2999,2999)
turtle.shape("turtle")
turtle.color("purple")
turtle.left(90)
# 寬度 width 筆的尺寸 pensize
turtle.width(20)
turtle.circle(100,180)

turtle.up()
turtle.left(90)
turtle.fd(220)
turtle.down()
turtle.left(90)
turtle.circle(120,180)
turtle.done()