Unity Fade delay when game ends - unity3d

Question

I'm fairly new at Unity and i'm trying to making a game.
I want to have an subtitle fading in when you're at the end of the game. This start when you hit a button.
But when I code a image that I fadein, it plays it directly when you start the game.
Do you guys know a solution?
#pragma strict
private var guiShow : boolean = false;
var car : GameObject;
var rayLength = 10;
var guiObject : GUITexture;
var fadeTime = 1.0;
enum Fade {In, Out}
var fadesubtitles : boolean = false;
function Update ()
{
var hit : RaycastHit;
var fwd = transform.TransformDirection(Vector3.forward);
if(Physics.Raycast(transform.position, fwd, hit, rayLength))
{
if(hit.collider.gameObject.tag == "car")
{
guiShow = true;
if(Input.GetKeyDown("e"))
{
guiShow = false;
}
else if(Input.GetKeyDown("e"))
{
guiShow = false;
}
}
}
else
{
guiShow = false;
}
}
function OnGUI()
{
if(guiShow == true)
{
GUI.Box(Rect(Screen.width / 2, Screen.height / 2, 150, 25), "Press F to escape");
if(Input.GetKeyDown("f")){
fadesubtitles = true;
}
}
}
if (fadesubtitles == true){
yield FadeGUITexture(guiObject, fadeTime, Fade.In);
yield WaitForSeconds(3.0);
yield FadeGUITexture(guiObject, fadeTime, Fade.Out);
}
function FadeGUITexture (guiObject : GUITexture, timer : float, fadeType : Fade) {
if (subtitles == true){
var start = fadeType == Fade.In? 0.0 : 1.0;
var end = fadeType == Fade.In? 1.0 : 0.0;
var i = 0.0;
var step = 1.0/timer;
while (i < 1.0) {
i += step * Time.deltaTime;
guiObject.color.a = Mathf.Lerp(start, end, i)*.5;
yield;
}
}
}

Answer 1

I'd start your game object in the 'disabled' state (uncheck it in the inspector). Then at then end of the game, have some code that enables it.

Answer 2

You can use iTween.
FadeFrom(GameObject target, Hashtable args)
Example:
iTween.FadeFrom(gameObject, iTween.Hash("alpha", 0f, "amount", 1f, "time", 2f));