​

function setup() {

  createCanvas(windowWidth, windowHeight);

  noStroke();

  fill('#fffff1');

  margin = height/10

}

​

​

function draw() {

  background(0);

​

  let numCircles = 20;

  let radius = margin;

  let spacing = TWO_PI / numCircles;

  translate(width / 2, height / 2);

​

  for (let i = 0; i < numCircles; i++) {

    let offset = i/10;

    let wave = tan(radians(frameCount) + offset);

    let angle = i * spacing;

    let x = (radius + wave) * cos(angle);

    let y = (radius + wave) * sin(angle);

    circle(x, y, margin/5);

  }

  // if(frameCount == 1) saveGif('polarTan', 3)

}

​