for event in pygame.event.get():
    if event.type == pygame.QUIT: sys.exit() 
    //once a key is released
	if event.type == pygame.KEYUP:
       		//Right Arrow Key
		if event.key == pygame.K_RIGHT: 
          		self.moving_right = False
       		if event.key == pygame.K_LEFT: 
          		self.moving_left = False
    //once a key is pressed
	if event.type == pygame.KEYDOWN:
       		if event.key == pygame.K_RIGHT:
          		self.moving_right = True
		if event.key == pygame.K_LEFT: 
        		self.moving_left = True