python 第一天学习(画个正方体)

import turtle
turtle.goto(200,0)
turtle.goto(200,200)
turtle.goto(0,200)
turtle.goto(0,0)
turtle.penup()
turtle.goto(100,100)
turtle.pendown()
turtle.goto(100,-100)
turtle.goto(-100,-100)
turtle.goto(-100,100)
turtle.goto(100,100)

turtle.penup()
turtle.goto(100,-100)
turtle.pendown
turtle.goto(200,0)
turtle.penup()
turtle.goto(100,100)
turtle.pendown()
turtle.goto(200,200)
turtle.penup()
turtle.goto(-100,100)
turtle.pendown()
turtle.goto(0,200)
turtle.penup()
turtle.goto(-100,-100)
turtle.pendown()
turtle.goto(0,0)
turtle.penup()
turtle.goto(100,-100)
turtle.pendown()
turtle.goto(200,0)
turtle.done