let a2 = 0;

​

let degree = 360;

let xoff = 0; let yoff = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  angleMode(DEGREES);

}

​

function draw() {

  background(0, 30);

  let nMap1 = map(noise(xoff, yoff), 0, 1, 40, 60)

  let nMap2 = map(noise(xoff, yoff), 0, 1, 20, 100)

  translate(width/2,height/2)

  push()

  rotate(a1)

  circles(0, 0, 300, nMap1);

  pop()

  push()

  rotate(a2)

  circles(0, 0, -180, nMap2);

  pop()

  xoff += 0.001

  yoff += 0.005

  a1 += 0.5

  a2 -= 0.5

​

}

​

function circles(x, y, r, a) {

  beginShape(TRIANGLE_STRIP);

  for (let i = 0; i <= degree; i += a) {

    let cr = r;

    let cx = x + cr * cos(i);

    let cy = y + cr * sin(i);

    noFill();

    strokeWeight(1);

    stroke(255);

    vertex(cx, cy);

  }

  endShape(CLOSE);

}

​