code: def display(surface):
      
      screen = pygame.display.get_surface()
      screen.blit(surface, (0, 0))
      pygame.display.flip()
docs: Displays a pygame.Surface in the window.
      
      in pygame the window is represented through a surface, on which you can draw
      as on any other pygame.Surface. A refernce to to the screen can be optained
      via the :py:func:`pygame.display.get_surface` function. To display the
      contents of the screen surface in the window :py:func:`pygame.display.flip`
      needs to be called.
      
      :py:func:`display` draws the surface onto the screen surface at the postion
      (0, 0), and then calls :py:func:`flip`.
      
      :param surface: the pygame.Surface to display
      :type surface: pygame.Surface