​

let Circle = function(x,y,r,c,e_r,inc) {

  this.x = x;

  this.y = y;

  this.r = r;

  this.c = c;

  this.e_r = e_r;

  this.theta = random() * TWO_PI;

  this.inc = inc;

  this.draw = function() {

    if (this.c) 

      fill(this.c);

    else

      noFill();

    strokeWeight(1);

    stroke(255);

    if (this.e_r) {

      push();

      translate(width/2,height/2);

      let _x = this.r * cos(this.theta);

      let _y = this.r * sin(this.theta);

      ellipse(_x,_y,this.e_r*2,this.e_r*2);

      this.theta+=this.inc;

      pop();

    } else {

      ellipse(this.x,this.y,this.r*2,this.r*2);  

    }

  }

}

let circles = [];

​

function setup() {

  createCanvas(400, 400);

  // paths

  for (let i = 0; i < 10; i++) {

    circles.push(new Circle(width/2,height/2,20+i*20,null,null));

    circles.push(new Circle(width/2,height/2,20+i*20,color(0,255,0),10,random(-0.01,0.01)));

  }

  // spheres

}

​

function draw() {

  background(0);

  circles.forEach(elem => elem.draw()); 

}