new_contents: """
  Eventually this will be an example showing how we support z-ordering.
  """
  import arcade
  
  SCALE = 0.75
  
  SCREEN_HEIGHT = 320
  SCREEN_WIDTH = 512
  
  
  class MyApplication(arcade.Window):
      """ Main application class. """
  
      def __init__(self, width, height):
          """ Set up the game and initialize the variables. """
  
          super().__init__(width, height)
  
          # Sprite lists
          self.all_sprites_list = arcade.SpriteList()
  
          # Set up the player
          self.score = 0
          self.player_sprite = arcade.Sprite("examples/images/playerShip1_orange.png", SCALE)
          self.player_sprite.center_x = 200
          self.player_sprite.center_y = 200
          self.all_sprites_list.append(self.player_sprite)
  
          # Make the asteroids
          enemy_sprite = arcade.Sprite("examples/images/meteorGrey_big1.png", SCALE)
          enemy_sprite.center_y = 200
          enemy_sprite.center_x =  150
          enemy_sprite.size = 4
          self.all_sprites_list.append(enemy_sprite)
  
          enemy_sprite = arcade.Sprite("examples/images/meteorGrey_big2.png", SCALE)
          enemy_sprite.center_y = 200
          enemy_sprite.center_x =  250
          enemy_sprite.size = 4
          self.all_sprites_list.append(enemy_sprite)
  
          enemy_sprite = arcade.Sprite("examples/images/meteorGrey_big3.png", SCALE)
          enemy_sprite.center_y = 150
          enemy_sprite.center_x = 200
          enemy_sprite.size = 4
          self.all_sprites_list.append(enemy_sprite)
  
          self.background = arcade.load_texture("stars.jpg")
  
      def on_draw(self):
          """
          Render the screen.
          """
  
          # Draw the background
          arcade.draw_xywh_rectangle_textured(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, self.background)
  
          # Draw all the sprites.
          self.all_sprites_list.draw()
  
  
  
  window = MyApplication(SCREEN_WIDTH, SCREEN_HEIGHT)
  arcade.run()
  
subject: Add start of z-order example.