GUI Problem

Unity Engine
1

Hey guys I have a problem with the GUI. I have created a script for my main menu but when I hit play it don’t show up.

#pragma strict

function Start () {

}

function Update () {

}

function onGUI () {
	
	GUI.Box(Rect(Screen.width / 2 - 800, Screen.height / 2 - 600, 800, 600), "");
	if(GUI.Button(Rect(Screen.width / 2 - 600, Screen.height / 2 - 500, 200, 100), "QUIT")){
	
		Application.Quit();
	
	}
}

I have linked it to my background plane but still nothing happens.

2

I think its: OnGUI

also check this:
http://forum.unity3d.com/threads/134625-Using-code-tags-properly

3

Oh my god, thank you so much and sorry for the code. Really thank you!