day17-homework.py 文件源码

def main():
  #??????
  windows = turtle.Screen()
  #????
  windows.bgcolor('blue')
  #????????
  bran = turtle.Turtle()
  bran.shape('turtle')
  bran.color('yellow')
  #??????
  for i in range(1,3):
    bran.setposition(300,300)
    bran.setheading(90)
    bran.setposition(300,0)
    bran.setheading(90)
    bran.setposition(0,0)
    bran.setheading(90)

    bran.dot(60,'red')

  bran.color('black')
  bran.stamp()
  bran.forward(-300)
  bran.right(90)
  bran.forward(300)
  bran.left(90)
  bran.forward(300)

  bran.clearstamps()

  for i in range(5):
    bran.undo()