Game over scene when the time is up ?

How can i do game over scene when the time is up in this code ?

using UnityEngine;
using System.Collections;

public class Timer : MonoBehaviour
{
public float Seconds = 59;
public float Minutes = 0;
void Update () {
if (Seconds <= 0) {
Seconds = 59;
if (Minutes >= 1) {
Minutes–;
} else {
Minutes = 0;
Seconds = 0;
GameObject.Find (“TimerText”).guiText.text = Minutes.ToString (“f0”) + “:0” + Seconds.ToString (“f0”);
}
} else {
Seconds -= Time.deltaTime;
}
if(Mathf.Round(Seconds) <= 9)
{
GameObject.Find (“TimerText”).guiText.text = Minutes.ToString (“f0”) + “:0” + Seconds.ToString (“f0”);
}
else
{
GameObject.Find (“TimerText”).guiText.text = Minutes.ToString (“f0”) + “:” + Seconds.ToString (“f0”);
}
}
}

First off make sure you format your code second make a script called Countdown or something and use this code
JavaScript:

var Minutes = 1; 
function Start(){
yield WaitForSeconds(Minutes * 60);
Application.LoadLevel("NAMEOFSCENE");
}

Or if you prefer C# (This may not work I don’t use C# but you get the idea):

public class Example : MonoBehaviour {
public int Minutes = 1;
    void Start() {

        yield return new WaitForSeconds(Minutes * 60);

    }
}

Unfortunately, in C#, Coroutines aren’t that easy to start as in US. Here’s how it should look:
public int minutes = 1;

IEnumerator GameOver()
{
yield return new WaitForSeconds(minutes * 60);
Application.LoadLevel("GAMEOVERSCENE");
}

...

void Start () //Countdown will begin when you load in the script
{
StartCoroutine(GameOver());
...
}

In C#, you explicitly have to set the method IEnumerator, and start it with StartCoroutine.