怎样在一个正方形里面画一个正方形?

粉红色的方块是taskI我试图画一个正方形里面的方块使用海龟图形。我不能画得和原来的一模一样。 这是我的代码

import turtle
win = turtle.Screen()
tess = turtle.Turtle()

for two in range(12):

for _ in range(4):
    tess.forward(20)
    tess.left(90)
tess.penup()
tess.goto(-7,-4)
tess.pendown()
for _ in range(4):
    tess.forward(35)
    tess.left(90)
tess.penup()
tess.goto(-14,-8)
tess.pendown()
for _ in range(4):
    tess.forward(50)
    tess.left(90)
tess.penup()
tess.goto(-21,-16)
tess.pendown()
for _ in range(4):
    tess.forward(70)
    tess.left(90)

问题来源StackOverflow 地址：/questions/59379800/how-to-draw-a-square-inside-a-square