Ptyhon 无角正方形（熟悉turtle库）

#Python 3.6 （32-bit）

import turtle
turtle.setup(500,500,20,30)
turtle.pensize(20)
turtle.penup()
turtle.fd(-150)
turtle.pendown()
turtle.right(90)
turtle.penup()
turtle.fd(50)
turtle.pendown()
turtle.color("green")
turtle.fd(100)
turtle.penup()
turtle.fd(50)
turtle.pendown()
turtle.color("purple")
turtle.left(90)
turtle.penup()
turtle.fd(50)
turtle.pendown()
turtle.fd(100)
turtle.penup()
turtle.fd(50)
turtle.pendown()
turtle.left(90)
turtle.color("blue")
turtle.penup()
turtle.fd(50)
turtle.pendown()
turtle.fd(100)
turtle.penup()
turtle.fd(50)
turtle.left(90)
turtle.color("red")
turtle.fd(50)
turtle.pendown()
turtle.fd(100)
turtle.penup()
turtle.fd(50)
turtle.hideturtle()

PS:本程序仅用作熟悉Pythonturtle库，实际应用请使用循环