dfg.py

import turtle
#背景赋值
Screen=turtle.Screen()
Screen.bgcolor("red")
pen=turtle.Pen()
pen.penup()
pen.goto(100,-100)
ll=len(50)
pen1.forward(len)
pen1.left(90)
pen1.forward(len)
pen1.left(90)
pen.forward(len)
pen.left(90)
pen.forward(len)
pen.left(90)
turtle.done()