Random Walker Cloud

let num = 2000;

let walker = [];

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

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

    walker[i] = new Walker();

  }

}

​

function draw() {

  fill(0, 10);

  rectMode(CORNER);

  rect(0, 0, width, height);

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

    walker[i].draw();

  }

}

​

class Walker {

  constructor() {

    this.vecLocation = createVector(width / 2, height / 2);

  }

  draw() {

    this.vecVelocity = createVector(random(-2, 2), random(-2, 2));

    this.vecLocation.add(this.vecVelocity);

    noStroke();

    fill(255, 127);

    rectMode(CENTER);

    rect(this.vecLocation.x, this.vecLocation.y, 2, 2);

  }

}