let cols; let rows; let size = 10;

let xoff = 0; let yoff = 0; let zoff = 0; let inc = 0.01;

let particles = []; 

​

function setup() {

  createCanvas(400, 400);

  cols = width/size;

  rows = height/size;

  for (let i=0; i<1000; i++){

    particles.push(new Particle());

  }

  background(0);

}

​

function draw() {

  background(0, 10);

  yoff = 0;

  for (let i=0; i<cols; i++){

    xoff=0;

    vel[i] = [];

    for (let j=0; j<rows; j++){

      let angle = noise(xoff, yoff, zoff) * TWO_PI;

      vel[i][j] = createVector(cos(angle), sin(angle));

      xoff+=inc;

      // rect(i*size, j*size, size, size);

      // textAlign(CENTER);

      // text(round(angle, 2)+" "+round(vel[i][j].x, 2)+" "+round(vel[i][j].y, 2), size/2 + i*size, size/2 + j*size);

    }

    yoff+=inc;

    zoff += 0.0003;

  }

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

    particles[i].drawParticle();

    particles[i].moveParticle(vel, 10);

  }

}