heat shimmer / bumpy circles

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(100);

  //noLoop();

  angleMode(DEGREES);

  stroke('white');

  strokeWeight(1);

​

}

function bumpyCircle(centre, approxRadius){

​

  beginShape();

  for (let angle = 0; angle < 360; angle += 3) {

    let radius = randomGaussian(approxRadius, 4);

    let p = p5.Vector.fromAngle(radians(angle), radius);

​

    p.add(centre);

    vertex(p.x, p.y);

  }

  endShape();

​

}

function mousePosAsVector(){

  return createVector(mouseX, mouseY);

}

​

function draw() {

  background(100);

  let centre = createVector(width / 2, height / 2);

  fill('yellow');

  bumpyCircle(centre, 200);

  fill('red');

  bumpyCircle(mousePosAsVector(), 180);

}