Write a bouncing ball video game. The game is similar to the one described and depicted in Figure of the text book. The balls bounces within the screen where the two horizontal walls are ?xed. The two vertical walls are bounded by the two paddles. Each paddle is a third of the height of the screen. The user presses keys to move the paddles up and down. Your task is to control the two paddles to keep the ball bouncing within the screen to simulate two players playing the ball. The game stops when one player wins or when the time is up. A player wins if the ball bounces out from the other player's side.