var yPos;

​

var xSpeed;

var ySpeed;

​

function setup() {

  createCanvas(600, 200);

  fill(255);

  xPos = 0;

  yPos = 50;

  xSpeed = 4;

  ySpeed = 4;

  noStroke();

}

​

function draw() {

  background(244, 132, 140);

  xPos += xSpeed;

  if(xPos > width){

    //xPos = 0;

    xSpeed = -4;

  } else if(xPos < 0){

    xSpeed = 4;

  }

  yPos += ySpeed;

  if(yPos > height){

    ySpeed = -4;

  } else if(yPos < 0){

    ySpeed = 4;

  }

  ellipse(xPos, yPos, 30, 30);

}