Timer.cs

using UnityEngine;
using System.Collections;
#region Not Used ATM
public class Timer : MonoBehaviour {
private float startTime;
private float restSeconds;
private int roundedRestSeconds;
private float displaySeconds;
private float displayMinutes;
public int CountDownSeconds=120;
private float TimePassed;
string timetext;
/* Found at:
 * http://answers.unity3d.com/questions/11939/count-down-timer.html
 */
 
// Use this for initialization
 
void Start () 
{
    startTime=Time.deltaTime;
 
}
 
void OnGUI()
	{
		TimePassed= Time.time-startTime;
		restSeconds = CountDownSeconds-TimePassed;
		roundedRestSeconds=Mathf.CeilToInt(restSeconds);
		displaySeconds = roundedRestSeconds % 60;
		displayMinutes = (roundedRestSeconds / 60)%60;
		timetext = (displayMinutes.ToString()+":");
		if (displaySeconds > 9)
		{
			timetext = timetext + displaySeconds.ToString();
		}
		else 
		{
			timetext = timetext + "0" + displaySeconds.ToString();
		}
		GUI.Label(new Rect(20,50,100,50), timetext);
		if( TimePassed >= CountDownSeconds)
		{
			TimePassed = 0;
			startTime = Time.deltaTime;
			Debug.Log("time's up");

		}
		
    }
void Update()
	{
		
	}
}
#endregion