def add_plane(self):
     self.plane = Sprite(pyglet.resource.image('gfx/plane.png'), 
                         anchor=(5,6))
     self.plane.position = PLANE_X, PLANE_Y
     self.add(self.plane)
     add_collision_map(self.plane, 'plane')
 def add_level(self):
     self.level = Sprite(pyglet.resource.image('gfx/level1.png'), 
                         anchor=(0,0))
     self.add(self.level)
     add_collision_map(Sprite(pyglet.resource.image(
                      'gfx/level1_collisionmap.png'), anchor=(0,0)), 'level')