I'm trying to make a Timer Via GUIText heres my code that I attached to the GUI Text

 private var startTime         : int = 15 ;   // start time in minutes.
private var passedTime      ;
private var minutes          : int ;
private var seconds          : int ;

function Awake()
{
    // Adjusting time from minutes to seconds.
    startTime = startTime * 60; 
}


function Update()
{   
    var theTime : String ;
    var timer ;
    timer = startTime ; 
    passedTime = timer - Time.time ; 

    minutes = passedTime / 60 ; 
    seconds = passedTime % 60 ;

    theTime = String.Format ("{0:00}:{1:00}", minutes, seconds); 
}

but When I go into debug mode the text just says "GUI Text" What Am I doing wrong? also I got the code from a forum thread that I read.