​

function setup() {

  createCanvas(400, 400);

  background(0);

  colorMode(HSB);

  rectMode(CENTER);

}

​

function draw() {

  strokeWeight(.5);

  //background(0);

  noFill();

  stroke(count%360,100,100,255);

  ellipse(200,200,200+200*sin(count/200.0), 200+200*cos(count/200.0));

  count+=1;

}