Load Scene from assetbundle WebGL (lightmapped)

Hi guys,

what is the best way to load scenes in WebGL ? I have one main scene and 10 others. I dont want to load all scenes at the initial downloading. I had tried to build assetbundle from one testing scene with the script from docs.

 [MenuItem("Assets/Build AssetBundles")]
     static void BuildAllAssetBundles()
     {
         BuildPipeline.BuildAssetBundles("AssetBundles",BuildAssetBundleOptions.None,BuildTarget.WebGL);
     }

and then load it with this one from

  public IEnumerator loadScene()
     {
         Debug.Log("started");
         using (www = WWW.LoadFromCacheOrDownload(url, 1))
         {
             yield return www;
 
             if (string.IsNullOrEmpty(www.error))
             {
                 AssetBundle assetBundle = www.assetBundle;
                 if (assetBundle != null)
                 {
                     string[] scenePath = assetBundle.GetAllScenePaths();
 
                     string mySceneName = scenePath[0];
 
                     mySceneName = mySceneName.Substring(0, mySceneName.Length - 6);
 
                     mySceneName = mySceneName.Substring(mySceneName.LastIndexOf("/") + 1);
 
                     
                     UnityEngine.SceneManagement.SceneManager.LoadScene(mySceneName);
                 }
                 else Debug.Log("assetBundle is null");
 
                 assetBundle.Unload(false);
                 www.Dispose();
             }
             else Debug.Log(www.error);
         }

The problem is that after i run the script .. after download i have a black screen ..... Can anybody solve my problem ? Or is there a better way to reduce the waiting time and ram consumption ? I tried to bundle just the objects from the scenes but they are lightmapped ...