宋钊宇3

#无边正方形.py
import turtle
turtle.setup(600,500,200,200)
turtle.penup()
turtle.fd(-30)
turtle.pendown()
turtle.pensize(5)
turtle.pencolor("blue")
turtle.seth(0)
for i in range(4):
    turtle.penup()
    turtle.fd(40)
    turtle.pendown()
    turtle.pensize(5)
    turtle.fd(50)
    turtle.penup()
    turtle.fd(40)
    turtle.left(90)