let swarm = []

let num_particles = 500;

​

const MIN = 0; MAX = 1000;

let diam = 0;

let inc = 1;

let alf = 100

let deg = 0;

let H1 = 0;

let x = 0;

let y = 0;

let reset1;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  colorMode(HSB, 360, 100, 100, 100);

  frameRate(20);

  background(0);

​

​

  //build swarm

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

    swarm.push(new particle(random(width), random(height)));

  }

}

​

function draw() {

  background(0,1);

  for(let i=0; i < swarm.length; i++){

    // swarm[i].update();

    swarm[i].display(); 

  }

  rectMode(CENTER);

  strokeWeight(random(1,3));

  stroke(H1, random(100), random(100), 100)

  fill(H1,100, 100, 5);

  // noFill();

  push();

  translate(width/2, height/2);

  rotate(deg);

  rect(x, y, diam);

  pop();

  diam += inc;

  alf -= inc;

  deg += random(0.01, 0.05);

​

  if (width < height){

    reset1 = width/2

  } else {

    reset1 = height/2

  }

  if (diam == MIN || diam == reset1){

    inc *= -1;

  }

  if (diam <= 0){

    H1 = random(360);

    x = random(-width*.3, width*.3);

    y = random(-height*.3, height*.3);

  }

​

  }

​

​

//Particle class

function particle(x, y){

  this.loc = createVector(x, y);

​

this.display = function(){

  noStroke();

  fill(180, random(100), random(100), random(100));

  circle(this.loc.x, this.loc.y, random(5));

}

​

}

​

function windowResized() {

  //console.log('resized');

  resizeCanvas(windowWidth, windowHeight);

}

​

​

​