Make a basic binary star sim 2d in p5.js

var s1 = createSprite(30, 200, 40, 40);
var s2 = createSprite(70, 200, 40, 40);
var s3 = createSprite(50, 180, 40, 40);
var s4 = createSprite(50, 220, 40, 40);

var stars = [];
stars.push(s1);
stars.push(s2);
stars.push(s3);
stars.push(s4);

function draw() {
  background("black");
  stroke("white");
  noFill();
  ellipse(s1.x, s1.y, s1.width, s1.height);
  ellipse(s2.x, s2.y, s2.width, s2.height);
  ellipse(s3.x, s3.y, s3.width, s3.height);
  ellipse(s4.x, s4.y, s4.width, s4.height);
  for (var i = 0; i < stars.length; i