Use a custom style for the position feature

examples/geolocation.js

@@ -8,7 +8,10 @@ goog.require('ol.dom.Input');
 goog.require('ol.geom.Point');
 goog.require('ol.layer.Tile');
 goog.require('ol.source.OSM');
-
+goog.require('ol.style.Circle');
+goog.require('ol.style.Fill');
+goog.require('ol.style.Stroke');
+goog.require('ol.style.Style');
 
 var view = new ol.View({
   center: [0, 0],
@@ -57,6 +60,19 @@ var accuracyFeature = new ol.Feature();
 accuracyFeature.bindTo('geometry', geolocation, 'accuracyGeometry');
 
 var positionFeature = new ol.Feature();
+positionFeature.setStyle(new ol.style.Style({
+  image: new ol.style.Circle({
+    radius: 6,
+    fill: new ol.style.Fill({
+      color: '#3399CC'
+    }),
+    stroke: new ol.style.Stroke({
+      color: '#fff',
+      width: 2
+    })
+  })
+}));
+
 positionFeature.bindTo('geometry', geolocation, 'position')
     .transform(function() {}, function(coordinates) {
       return coordinates ? new ol.geom.Point(coordinates) : null;