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                <!-- Note: Does not work on mobile -->

<h3 style="text-align: center; color: #ffffff;">Hover over image to see scrolling effect</h3>

<div class="portfolio">
  <div class="img01">
    <img class="img-responsive center" src="">


                /* The monitor image is a transparent .png (drag image to see) with the area under the screen textured with the same pattern as the body. The textured area wouldn't be necessary if a laptop image was used instead! I just liked this look more :P */

body {
  background-image: url("");

.portfolio {
  margin: 50px auto;
  overflow: hidden;

.img01 img {
  background-image: image-url(""), image-url("");
  background-position: 40% -10%;
  background-repeat: no-repeat;
  -webkit-transition:background-position 3.5s ease;
  position: relative;
  z-index: 1;
  margin: 0 auto;

.img01 img:hover {
  background-position: 40% 132%;
  position: relative;