​

let num = 50;

let rad = 3;

​

function setup() {

  createCanvas(400, 400);

  strokeWeight(3);

  for(let i = 0; i < num; i ++) {

    let r = (i + 1) * rad;

    points.push(createVector(

      r,

      0

    ));

  }

}

​

function draw() {

  background(220);

  noFill();

  for(let i = 0; i < num; i ++) {

    let p = points[i];

    p.y += ((num - i) + 1) * 0.005;

    let r = p.x;

    let a = p.y;

    ellipse(width/2 + cos(a) * r, height/2 + sin(a) * r, 5, 5);

    if(i == 0) {

      continue;

    }

    let prev = points[i - 1];

    let pr = prev.x;

    let pa = prev.y;

    line(width/2 + cos(a) * r, height/2 + sin(a) * r, width/2 + cos(pa) * pr, height/2 + sin(pa) * pr);

  }

}