let xSpeed = 25;

​

function setup() {

  createCanvas(600, 600);

}

​

function draw() {

  background(220);

  fill("orange")

  circle(xBall,300,200);

  xBall = xBall + xSpeed; 

  if(xBall > 600){

    xSpeed = -25;  

  }else if(xBall < 0){

    xSpeed = 25;

  }

​

  fill("red")

  circle(xBall,400,89);

​

​

   fill("blue")

  circle(xBall,499,258);

​

}