$(document).ready(function() {
    $(document).mousemove(function(event) {
        TweenLite.to($("body"), 
        .5, {
            css: {
                backgroundPosition: "" + parseInt(event.pageX / 8) + "px " + parseInt(event.pageY / '12') + "px, " + parseInt(event.pageX / '15') + "px " + parseInt(event.pageY / '15') + "px, " + parseInt(event.pageX / '30') + "px " + parseInt(event.pageY / '30') + "px",
            	"background-position": parseInt(event.pageX / 8) + "px " + parseInt(event.pageY / 12) + "px, " + parseInt(event.pageX / 15) + "px " + parseInt(event.pageY / 15) + "px, " + parseInt(event.pageX / 30) + "px " + parseInt(event.pageY / 30) + "px"
            }
        })
    })
})