let y = 180;

let xspeed = 20;

let yspeed = 8;

​

let r = 25;

​

function setup() {

  createCanvas(640, 360);

}

​

function draw() {

  background(255, 182, 193); // Set background color to pink

  ellipse(x, y, r * 2, r * 2);

  x += xspeed;

  y += yspeed;

  if (x > width - r || x < r) {

    xspeed = -xspeed;

  }

  if (y > height - r || y < r) {

    yspeed = -yspeed;

  }

}

​