let r = 100;

let increment;

let amount = 2000;

​

function setup() {

  createCanvas(500, 500);

  background(220);

  fill(0);

  noStroke();

  frameRate(30);

  strokeWeight(2);

​

}

​

function draw() {

  background(255);

  rotate(PI/16);

  translate(45, -45);

  increment = TWO_PI / amount;

  t = frameCount;

  let k = 0;

  let amp = map(sin(frameCount * 0.015 * 0.5), -1, 1, -10, 12);

  let curve = map(sin(frameCount * 0.015 * 0.5), -1, 1, 0.99, 0.99);

  for (let i = 0; i < TWO_PI - increment; i += increment) {

    r = map(sin(i * 8), -1, 1, curve, 1) * amp;

    x = cos(i) * r + 250;

    y = sin(i) * r + 250;

    // y = x * x;

    if (k % 10 == 0) {

        let j = i + 0.000000001;

      let r2 = map(sin(j * 8), -1, 1, curve, 1) * amp;

        let x2 = cos(j) * r2 + 250;

        let y2 = sin(j) * r2 + 250;

      // y2 = 

      // ellipse(x, y, 10);

      stroke(0);

            let slope = (y2 - y) / (x2 - x);

      let x0 = x - 1000;

      let x3 = x2 + 1000;

      let y0 = y - 1000 * slope;

      let y3 = y2 + 1000 * slope;

      line(x0, y0, x3, y3);

      noStroke();

    }

    // ellipse(x, y, 2);

    k++;

  }

  // console.log(amp);

}