const num = 2000 // how many particles will be displayed

​

const noiseScale = 0.01;

​

function setup() {

  createCanvas(800, 600);

  for(let i = 0; i < num; i++) {

    particles.push(createVector(random(width), random(height)));

  }  

}

​

function draw() {

  background(0); // changed background to black

  for(let i = 0; i < num; i++) {

    let p = particles[i];

    let n = noise(p.x * noiseScale, p.y * noiseScale);

    // Change particle color

    let particleColor = color(random(255), random(255), random(255), 150); // random color with transparency

    fill(particleColor);

    // Change particle speed

    let speed = map(n, 0, 1, 0.5, 2); // adjust speed based on noise value

    // Draw rectangle particles

    let particleSize = map(n, 0, 1, 2, 20); // scale particle size based on noise value

    rect(p.x, p.y, particleSize, particleSize); // draw rectangle with scaled size

    // Update particle position

    let a = TAU * n;

    p.x += cos(a) * speed;

    p.y += sin(a) * speed;

    // Wrap particles around canvas edges

    if (p.x < 0) p.x = width;

    if (p.x > width) p.x = 0;

    if (p.y < 0) p.y = height;

    if (p.y > height) p.y = 0;

  } 

}

​