var offset = 0;

var step = 0.005;

function setup() { 

  createCanvas(320, 240);

  capture = createCapture(VIDEO);

  capture.size(320, 240);

  background(220);

  noStroke();

  frameRate(30);

} 

​

function draw() {

  background(0);

  capture.loadPixels();

  var innerStep = 5;

    for (var x = 0; x < width; x+= innerStep) {

    for (var y = 0; y < height; y+= innerStep) {

      var i = (y * width + x)*4;

        var r = capture.pixels[i];

        var g = capture.pixels[i+1];

        var b = capture.pixels[i+2];

      var output = noise(x + offset, y + offset);

      offset += step;

      if (output > 0.5) {

        fill(r, g, b);

        ellipse(x, y, 3, 3);

      }

    }

  }

}