text: goog.require('ol.Map');
  goog.require('ol.View');
  goog.require('ol.layer.Tile');
  goog.require('ol.source.MapQuest');
  goog.require('ol.source.TileWMS');
  
  
  var layers = [
    new ol.layer.Tile({
      source: new ol.source.MapQuest({layer: 'sat'})
    }),
    new ol.layer.Tile({
      extent: [-13884991, 2870341, -7455066, 6338219],
      source: new ol.source.TileWMS({
        url: 'http://demo.boundlessgeo.com/geoserver/wms',
        params: {'LAYERS': 'topp:states', 'TILED': true},
        serverType: 'geoserver'
      })
    })
  ];
  var map = new ol.Map({
    layers: layers,
    target: 'map',
    view: new ol.View({
      center: [-10997148, 4569099],
      zoom: 4
    })
  });
  