$(document).ready(function()
{

          $(document).ready(function()
         {

            var x = 2;
            var sliderPosition = $("#shifter").position();
            var startingPosition = sliderPosition.left;
            var time = 5000;

            jQuery.fn.sld = function(startingPosition, time)
            {

                for (i=0;i<=999;i++)
                {

                setTimeout((function()
                {

                    startingPosition = startingPosition-1800;
                    $('#shifter').animate({left: startingPosition}, 30000, "linear");
                    return startingPosition;

                }), time);


                setTimeout((function()
                {
                        startingPosition = startingPosition+1800;
                        $('#shifter').animate({left: startingPosition},0, "linear");
                        return startingPosition;

                }), time);
                }



           };
           $(this).sld(startingPosition, time);


        });

});