1.   let backgroundColor = 0;
2.   let canvasWidth = 600;
3.   let canvasHeight = 400;
4.   let paddleWidth = 5;
5.   let paddleHeight = 60;
6.   let leftPaddleY = canvasHeight / 2 - paddleHeight / 2;
7.   let rightPaddleY = canvasHeight / 2 - paddleHeight / 2;
8.   let ballY = 195;
9.   let ballX = 295;
10.   let velocity = 2;
11.   let velocityY = 0;
12.   let rightPaddleX = 585;
13.   let leftPaddleX = 10;
14.  
15. function setup() {
16.   createCanvas(canvasWidth, canvasHeight);
17. }
18.  
19. function draw() {
20.   background(backgroundColor);
21.   rect(leftPaddleX, leftPaddleY, paddleWidth, paddleHeight);
22.   rect(rightPaddleX, rightPaddleY, paddleWidth, paddleHeight);
23.   ellipse(ballX, ballY, 10);
24.  
25. ballX = ballX + velocity;
26. ballY = ballY + velocityY
27.  
28.   if (ballHitPaddle()) {
29.     velocity = -velocity;
30.  
31.   let leftPaddleMiddle = leftPaddleY + paddleHeight / 2;
32.   let rightPaddleMiddle = rightPaddleY + paddleHeight / 2;
33.    
34.     if (ballX < leftPaddleX)
35.       velocityY = (leftPadlleMiddle - ballY) /6;
36.   } else {
37.     velocityY (rightPaddleMiddle -ballY) /6;
38.   }
39.   }
40.  
41.   if (ballY < 0 || ballY > canvasHeight) {
42.     }
43.  
44.  if (keyIsDown(UP_ARROW)) {
45.    rightPaddleY = rightPaddleY - 3;
46.  }
47.   if (keyIsDown(DOWN_ARROW)) {
48.    rightPaddleY = rightPaddleY + 3;
49.  }
50.  
51.    if (keyIsDown(81)) {
52.    leftPaddleY = leftPaddleY - 3;
53.  }
54.   if (keyIsDown(65)) {
55.    leftPaddleY = leftPaddleY + 3;
56.  }
57. }
58.  
59.  
60.  function ballHitPaddle()  {
61.    // Left Paddle
62.    if (ballY > leftPaddleY &&
63.        ballY < leftPaddleY + paddleHeight &&
64.        ballX < leftPaddleX) {
65.      return true
66.    }
67.      
68.      // Right Paddle
69.    if (ballY > rightPaddleY &&
70.        ballY < rightPaddleY + paddleHeight &&
71.        ballX > rightPaddleX)  {
72.      return true
73.    // No Paddle
74.    }
75.    
76.    return false
77.    }