Infinitely scroll the background of an element with jquery

inifite_scrolling_bg.js

var SCROLL_TIME = 120; // seconds to scroll through

$(document).ready(function () {
    var scrollingContent = function() {
        console.log("Scrolling background");
        $('.container').css('background-position-y', 0);
        $('.container').animate({
            'background-position-y': -1 * $(this).height()
        }, SCROLL_TIME * 1000, 'linear', scrollingContent);
    };

    scrollingContent();
});