Basic Google Map Move Marker

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Simple icons</title>
    <link href="https://developers.google.com/maps/documentation/javascript/examples/default.css" rel="stylesheet">
    <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
    <script>

x=26.0906973;
y=-81.732371;

function initialize() {
  var mapOptions = {
    zoom: 15,
    center: new google.maps.LatLng(x,y),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }
  map = new google.maps.Map(document.getElementById('map-canvas'),
                                mapOptions);

  var image = 'http://www.apponic.com/data/softimg/mac/audio/audio-editors/tux-guitar-79268-icon.jpeg';
  var myLatLng = new google.maps.LatLng(x,y);
        marker = new google.maps.Marker({
      position: myLatLng,
      map: map,
      icon: image
  });

        moveMarker( map, marker );
}

function moveMarker( map, marker ) {

    //delayed so you can see it move
    setInterval( function(){
        x+=0.0001010;
        y-=0.0001010;
        marker.setPosition( new google.maps.LatLng( x, y ) );
        map.panTo( new google.maps.LatLng( x, y ) );

    }, 500 );

};

google.maps.event.addDomListener(window, 'load', initialize);

    </script>
  </head>
  <body>
    <div id="map-canvas"></div>
        <button>Click me</button>
  </body>
</html>