const sin = Math.sin, cos = Math.cos;

const vec2 = (x, y) => ({'x': x, 'y': y});

const vec_add = (a, b) => vec2(a.x + b.x, a.y + b.y);

​

const circle = (phi, r) => vec2(r * cos(phi), r * sin(phi));

const R = (f, p, a, s) => circle((s * f + p) * TAU, a);

const O = (f, p, v, d, s) => v + d * sin((s * f + p) * TAU);

​

// -------------------------------------------------------------

// this is the function, edit this thing

const f = (s, t) => vec_add(R(5, O(7, 0, 0.25, .2, .3), .7, s), R(-2, 0, O(7, t, 1, .5, s), s));

// -------------------------------------------------------------

​

// setup and drawing

const W = 720, W2 = W / 2;

function setup() {

  createCanvas(W, W);

  frameRate(60);

}

​

const N = 4096;

function draw() {

  const t = Date.now() * 0.0002;

  background('#000');

  stroke('#fff');

  noFill();

  strokeWeight(2.0);

  beginShape();

  for (let i = 0; i < N; i++) {

    const s = i / N;

    const p = f(s, t);

    vertex(W2 + 100 * p.x, W2 + 100 * p.y);    

  }

  endShape(CLOSE);

}