<div class="wrapper">
  <div class="sliding-background"></div>
</div>
.wrapper {
  overflow: hidden;
}

.sliding-background {
  background: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/9632/sliding-background-wwf.jpg") repeat-x;
  height: 560px;
  width: 5076px;
  animation: slide 60s linear infinite;
}

@keyframes slide{
  0%{
    transform: translate3d(0, 0, 0);
  }
  100%{
    transform: translate3d(-1692px, 0, 0);
  }
}

External CSS

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External JavaScript

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