p5js atom

<head>
<script src = "p5.js"></script>
<script src ="p5.dom.js"></script>
</head>
<body>
<script>
//https://www.kadenze.com/courses/the-nature-of-code-ii/sessions/introduction-overview
var x = 4;
var w;
var m;
var xpos;
var ypos;
function setup(){
  createCanvas(400,400);
  w = new Walker();
  //m = new Move();
}

function draw(){
  background(255);
  w.display(xpos,ypos);

}

function Walker(){
  this.x = xpos;
  this.y = height/2;
  this.display = function(){
    //fill(255);
    noFill();
    ellipse(this.x,this.y,45,45);
  }
}

</script>

</body>