ball_image = resource.image('images/ball.png')
ball = Sprite(ball_image)
ball.x = window.width / 2 - ball.width/2
ball.y = window.height / 2 - ball.width/2
ball.speed_x = INITIAL_BALL_SPEED
ball.speed_y = INITIAL_BALL_SPEED
PADDLE_MARGIN = 10
paddle_image = resource.image('images/paddle.png')
paddle1 = Sprite(paddle_image)
paddle1.x = PADDLE_MARGIN
paddle1.y = window.height / 2 - paddle1.height / 2
paddle1.speed = 400
paddle2 = Sprite(paddle_image)
paddle2.x = window.width - paddle2.width - PADDLE_MARGIN
paddle2.y = window.height / 2 - paddle2.height / 2
paddle2.speed = 400
score_1 = 0
score_2 = 0
score_label_1 = Label('0',
font_size=48,
x = window.width/4,
y = window.height,
anchor_x = 'center',
anchor_y = 'top')
