// code for https://youtu.be/vqE8DMfOajk

​

function Particle(x, y) {

  this.x = x;

  this.y = y;

  this.r = random(4, 32);

​

  this.update = function() {

    this.x += random(-10, 10);

    this.y += random(-10, 10);

​

    this.x = constrain(this.x, 0, width);

    this.y = constrain(this.y, 0, height);

  };

​

  this.show = function() {

    noStroke();

    let px = floor(this.x / vScale);

    let py = floor(this.y / vScale);

    let col = video.get(px, py);

    //console.log(col);

    fill(col[0], col[1], col[2], slider.value());

    ellipse(this.x, this.y, this.r, this.r);

  };

}