auto refresh marker on google map with directions

var locations=[
['19.0018014','72.914170300']'
['18.4915595','73.886065199'],
['17.5272371','75.957780299'],
['19.0787678','75.752507899'],
['19.9971895','73.916395800'],
['21.16536','72.79387']
];

var map;
var NewLatLng=[];
var NewLatLng1=[]
var markers=[];
var marker ;
   function initialize()
  {
        var latlng = new google.maps.LatLng(21.16536,72.79387);
        var myOptions = {
        zoom: 5,
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        map = new google.maps.Map(document.getElementById("map"), myOptions);
        map = new google.maps.Map(document.getElementById("map"), myOptions);
        marker = new google.maps.Marker(
        {
            position: new google.maps.LatLng(21.1673643, 72.7851802),
            map: map,
            title: 'Click me'
        });
        markers.push(marker);
        $.each(locations, function (i, item) {
            NewLatLng.push(new google.maps.LatLng(item[0], item[1]));
        });
        var infowindow = new google.maps.InfoWindow({
            content: 'Location info:<br/>Movable Marker !!'

        });
        google.maps.event.addListener(marker, 'click', function ()
        {
            infowindow.open(map, marker);
            setTimeout(function(){infowindow.close();}, '5000');
        });
        $.each(NewLatLng, function (i, item) {

            setTimeout(function(){
            marker.setPosition(item);

            markers.push(marker);
NewLatLng1.push(item);
 var flightPath = new google.maps.Polyline({
          path: NewLatLng1,
          strokeColor: '#FF0000',
          strokeOpacity: 1.0,
          strokeWeight: 2
        });
 flightPath.setMap(map);
            }, i*3000);

        });





    }
    window.onload =initialize;