28-09 EX 3

var posX = 0;

var posY = 0;

​

var speedX = 1;

var speedY = 1;

​

​

function setup() {

  createCanvas(500, 500);

  posX = random(500);

  posY = random(500);

​

}

​

function draw() {

  background(0);

  ellipse(posX, posY, 100, 100);

  if (posX >= 500 || posX < 0)

  {

    speedX = speedX * -1;

  }

  if (posY >= 500 || posY < 0)

  {

    speedY = speedY * -1;

  }

​

​

  posX = posX + speedX*5;

  posY = posY + speedY*5;

}