createCanvas(400, 400);

  background(0);

  for (let i = 0; i < 300; i++)

  {

    particle[i] = new Particle();

  }

}

​

let particle = [];

​

class Particle {

  constructor(){

    this.x = random(0, 400);

    this.y = random(0, 400);

  }

  draw(){

    circle(this.x, this.y, 5)

  }

}

​

function draw() {

  for (let i = 0; i < 300; i++)

  {

    particle[i].draw();

  }

}