let pts = amp * 10;

let period = 15;

​

let x = [];

let y = [];

let z = [];

​

let cr = [];

​

let xoff = 0;

let a = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight, WEBGL);

  background(220);

  angleMode(DEGREES);

  colorMode(HSB)

  noFill();

  strokeWeight(2)

}

​

function draw() {

  background(0);

  orbitControl();

  let nMap = map(sin(xoff), 0, 1, 0, amp);

  rotateY(a)

  for (let i = 0; i < 20; i++) {

    stroke(i * 5 * nMap, 50, 100)

    polar(i * 25 * nMap);

  }

  xoff += 0.05;

  a += 0.5

}

​

function polar(rad) {

  beginShape();

  for (let i = 0; i < pts; i++) {

    let angle = (i / pts) * 361;

    cr = amp * cos(angle * period);

    x[i] = (rad + cr) * cos(angle) * cos(angle);

    y[i] = (rad + cr) * cos(angle) * sin(angle);

    z[i] = (rad + cr) * sin(angle)

    vertex(x[i], y[i], z[i]);

  }

  endShape(CLOSE);

}

​