createCanvas(400, 300);

  capture = createCapture(VIDEO);

  capture.size(400, 300);

  capture.hide();

  initOrChangePattern();

}

function initOrChangePattern() {

  channel_shift = int(2);

  glitch_len = 1000 * 4;

}

function draw() {

  background("black");

  if (frameCount % 60 == 0) {

    initOrChangePattern();

  }

​

  capture.loadPixels();

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

    for (let p = channel_shift; p < glitch_len; p += 4)

      if (i + p + 2 < capture.pixels.length) {

        // let red = capture.pixels[i];

        // let green = capture.pixels[i + 1];

        // let blue = capture.pixels[i + 2];

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

        capture.pixels[i + p] = capture.pixels[i];

        capture.pixels[i + p + 1] = capture.pixels[i + 1];

        capture.pixels[i + p + 2] = capture.pixels[i + 2];

      }

  }

  capture.updatePixels();

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

}

function keyPressed() {

  if (key == "s") {

    saveGif("capture.gif", 5);

  }

}

​