let arr = [1,2,3,4,5]

}

​

// Declare a variable for the horizontal position of the ball

let x[b], y[b];

​

// Declare a variable for the horizontal speed of the ball

let x[b]speed = 1;

let y[b]speed = 1.2;

​

function setup() {

  createCanvas(400, 400);

  // Initialize the position in the center

  x[b] = width / 2;

  y[b] = height /2;

}

​

function draw() {

  background(220);

​

  // Move the ball ball, either right or left

  x[b] += x[b]speed;

  y[b] += y[b]speed;

  // Simplified Version:

  // When the ball is at either left or right border

  if (x[b] <= 0 || x[b] >= width) {

    // Flip the sign of the direction

    x[b]speed *= -1;

  }

  if (y[b] <= 0 || y[b] >= height) {

    // Flip the sign of the direction

    y[b]speed *= -1;

  }

​

  // Draw the ball

  ellipse(x[b], y[b], 50, 50);

}

​