​

const maxRad = 150;

const minRad = 50;

​

function setup() {

  createCanvas(400, 400);

  stroke(0, 128, 255);

  noFill();

}

​

function draw() {

  background(0, 10);

  const cx = width/2;

  const cy = height/2;

  let ang = 0;

  beginShape();

  while(ang < TAU) {

    let x = cos(ang);

    let y = sin(ang);

    const n = noise(10 + x/2, 10 + y/2, frameCount * noiseScale);

    const r = map(n, 0, 1, minRad, maxRad);

    vertex(cx + x * r, cy + y * r);

    ang += 0.01; 

  }

  endShape(CLOSE);

}