cn-sensei-guides/white/04-03

// Scene - Update Every Frame
/**
 * leftPaddle
 * if the up arrow is pressed, move the leftPaddle up
 * if the down arrow is pressed, move the leftPaddle down
**/
if ( isKeyPressed(Keys.upArrow) ) {
    moveY(leftPaddle, -300);
}

if ( isKeyPressed(Keys.downArrow) ) {
    moveY(leftPaddle, 300);
}

/**
 * rightPaddle
 * if the rightPaddle is below the mouse, move the rightPaddle up
 * if the rightPaddle is above the mouse, move the rightPaddle down
**/

if ( rightPaddle.y() > getMouseY() ) {
    moveY(rightPaddle, -300);
}

if ( rightPaddle.y() < getMouseY() ) {
    moveY(rightPaddle, 300);
}

/**
 * walls
 * if the ball touches right wall, give player 1 a point and reset the ball
 * if the ball touches left wall, give player 2 a point and reset the ball
**/


if (ball.isTouchingRightWall() ) {
    leftPaddle.score += 1;
    leftScoreLabel.text(leftPaddle.score);
    ball.x(400);
    ball.y(300);
}
if ( ball.isTouchingLeftWall() ) {
    rightPaddle.score += 1;
    rightScoreLabel.text(rightPaddle.score);
    ball.x(400);
    ball.y(300);
}