createCanvas(400, 300);

      capture = createCapture(VIDEO);

      capture.size(400, 300);

      capture.hide();

    }

    function draw() {

      capture.loadPixels();

      for (let i = 0; i < capture.pixels.length; i += 4) {

        capture.pixels[i] += random(20,100); //red

        capture.pixels[i + 1] = random(30,200); //green

        capture.pixels[i + 2] = random(10,20); //blue

        capture.pixels[i+3] = 20;//alpha

      }

      capture.updatePixels();

      image(capture, 0, 0, width, height);

    }

    function keyPressed() {

      if (key == "s") {

        saveGif("capture.gif", 5);

      }

    }