<div class="moo"></div>
.moo {
  height: 900px;
  width: 100%;
  background: url("https://3.bp.blogspot.com/-RaXRORrsW6A/UZ0DfivwEhI/AAAAAAAAAcg/NJj1oL4uRE4/s320/Forest_Repeatable_Background.jpg") repeat-x left top;
}
position=0;
var interval = setInterval(function () {
position -= 1;
$(".moo").css({ "background-position":+ position +"px 0px" }) },50 );

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. //cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js