bug.py

import turtle

pen= turtle.Pen()

a=turtle.Screen()
size=a.textinput("提示","你想要多大的魔法阵呀？")
size=int(size)
pen.circle(size)
pen.circle(size,360,255)
pen.circle(size,460,250)
pen.circle(size,360,250)
turtle.done()