var rot2=0.01

function setup() {

  createCanvas(1000,1000);

  background(0);

}

​

function draw() {

  noFill()

  stroke(0,0,255,70);

  translate(500,500);

  rotate(rot1);

 ellipse(50,50,50,50,);

  translate(200,200);

  rotate(rot2);

  ellipse(125,125,50,);

  rot2=rot2+0.02

  rot1=rot1+0.01;

}