let a = 0;

let numRings = 20;

let numPoints = 150;

let points = [];

let rounds = 1;

​

function setup() {

  createCanvas(600, 600);

  stroke(255);

  fill(255);

  colorMode(HSB);

  createStars();

}

​

function draw() {

  background(0);

  translate(width/2, height/2);

  for(let i = points.length-1 ; i >= 0 ; i--){

    stroke(points[i].color, 255, 255);

    point(points[i].x, points[i].y);

    points[i].y = points[i].y + points[i].vel;

    if(points[i].y > height/2){

      points.splice(i, 1);

    }

  };

  if(points.length == 0){

    createStars();

  }

​

}

​

function createStars(){

  for (let j = 0; j < numRings; j++) {

​

    let color = map(j, 0, 10, 10, 255);

    let offsetX = j * map(noise(rounds), 0, 1, -5, 5);

    let offsetY = j * map(noise(rounds-1), 0, 1, -5, 5);

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

      r = r + random(-5, 5);

      let x = r * sin(a);

      let y = r * cos(a);

​

      points.push({x: x + offsetX, y: y + offsetY, color, vel: random(2, 5)});

​

      a += i;

    }

  }

  rounds++;

}