​

var speed;

​

function setup() {

  createCanvas(400, 400);

  x=1;

  speed = 5;

  noStroke();

}

​

function draw() {

  background(240);

  x = x + speed;

  fill(255,0,0);

  ellipse(x,100,10,10);

​

  fill(x,100,50);

  ellipse(x,300,20,20);

  if(x > width){

    speed = speed * -1;

  }

  if(x < 0){

    speed = speed * -1; 

    speed = speed *1.2;

  }

​

}