FadeIn/Out code optimisation

Hey All, i was wondering if theres anything i could do to optimise this code i wrote for a smooth fade in, not that its behaving slowly, i just want to get the hang of code optimisation, feel free to use it btw, it gives a lovely AAA feeling.

 public var fadeInTexture : Texture2D;
 public var fadeOutTexture : Texture2D;
 public var fadeSpeed = 0.3;
 public var fadeInMultiplier = -5;
 public var fadeOutMultiplier = 1;
 public var reloadWait = 2.0f;
 public var newTimeScale = 0.1;
 public var rampTimeIn = 0.05;
  
 var drawDepth = -1000;
 
 private var alpha = 1.0; 
  
 private var fadeDir = 0;
 
 private var fadingIn = true;
  
 function OnGUI()
 {
  
     alpha += fadeDir * fadeSpeed * Time.deltaTime;    
     alpha = Mathf.Clamp01(alpha);    
  
     GUI.color.a = alpha;
  
     GUI.depth = drawDepth;
     
     if (fadingIn)
     {
     GUI.DrawTexture(Rect(0, 0, Screen.width, Screen.height), fadeInTexture);
     }
     if (!fadingIn)
     {
     GUI.DrawTexture(Rect(0, 0, Screen.width, Screen.height), fadeOutTexture);
     }
 }
  
 function fadeIn()
 {
     Time.timeScale = 0.1;
     yield WaitForSeconds(0.01);
     fadeDir = -fadeInMultiplier;
     fadingIn = true;    
 }
  
 function fadeOut()
 {
     fadeDir = fadeOutMultiplier;
     fadingIn = false;
     yield WaitForSeconds(reloadWait);
     Application.LoadLevel(Application.loadedLevel);
     
 }
  
 function Start()
 {
     alpha=1;
     Time.timeScale = newTimeScale;
     fadeIn();
 }
 
 
 function FixedUpdate() 
 {
     if (fadingIn) 
         {
             newTimeScale+=rampTimeIn;
             Time.timeScale = newTimeScale;
             Time.fixedDeltaTime = 0.02 * Time.timeScale;
         }
         if (Time.timeScale >=1) 
         {
             Time.timeScale = 1;
             Time.fixedDeltaTime = 0.02 * Time.timeScale;
         }
     }
 
 
 
 function OnTriggerEnter (other: Collider)
 {
     if(other.gameObject.tag != "Player")
     {
         var go:GameObject = other.gameObject;
         Destroy(go);
     }
     else
     {
         fadeOut();
    }
 }