text: #!/usr/bin/env python2
  import turtle
  
  def draw_square(size=100):
      for x in range(4):
          turtle.forward(size)
          turtle.left(90)
  
  def hvn(size=100):
      """Draw Das Haus vom Nikolaus, using draw_square()"""
      half_diagonal = (2 * size**2) ** .5 / 2
  
      draw_square(size)
      # Draw a "fish".
      turtle.left(45)
      turtle.forward(half_diagonal)
      draw_square(size=half_diagonal)
      turtle.right(90)
      turtle.forward(half_diagonal)
  
  
  turtle.delay(100)
  hdn()
  raw_input()
  