Need help getting screen to fade when loosing last life

I'm trying to get the screen to fade and transition to the game over screen. I already created a scrip that fades but only when I start a new game, restart and exit.

 public class ScreenFader : MonoBehaviour {
 
     // Holds the texutre to fill the screen
     [SerializeField] Texture2D fadeTexture;
     [SerializeField]Color colorStart = Color.black;
     [SerializeField]Color colorEnd = Color.clear;
 
     // Time to completion of fade
     [SerializeField]float fadeTime = 1.0f;
 
     //Internally used to track the passage of time
     private float timer = 0.0f;
 
     // Defines the type of function which is used as a
     // delegate when the fade has completed
     public delegate void FadeCompleteEvent();
 
     // The container for the functions to be triggered when
     // the fade has completed
     private event FadeCompleteEvent OnfadeComplete = null;
 
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
         // Accumulate the passage of time
         timer += Time.fixedDeltaTime;
 
         if (timer > fadeTime)
         {
             timer = fadeTime;
         }
         if (OnfadeComplete != null)
         {
             OnfadeComplete();
         }
         OnfadeComplete = null;
         Destroy(gameObject, 0.1f);
     }
     
     // Called when the GUI is drawn
     void OnGUI() { 
     // Determine the passage of time as a
     // percentage of the duration time
         float percent = timer / fadeTime;
     
     // Use the percentage to determine the 
     // gradient between the two
         GUI.color = Color.Lerp(colorStart, colorEnd, percent);
 
     // Create a rectangle the size of the screen
         Rect screenRectangle = new Rect(0, 0, Screen.width, Screen.height);
         GUI.DrawTexture(screenRectangle, fadeTexture);
 
     }
 
     // Loads the prefab and creates an instance from it
     static public void CreateFade(string _prefabName,
                                        FadeCompleteEvent _completeEvent) { 
     // Load the asset as a basic object
     Object fadePrefab = Resources.Load(_prefabName, typeof(Object));
     
     // Create a new game object from the loaded prefab
     GameObject fadeObject = Instantiate(fadePrefab) as GameObject;
 
     // Find the fader's script component and the assign the event
     ScreenFader fader = fadeObject.GetComponent<ScreenFader>();
     fader.OnfadeComplete = _completeEvent;
     }
 
 }

Here's the player scrip where it takes the player to the game over screen

 if (CurLives == 0) {
                  Application.LoadLevel("GameOverScreen");
              }