// Sets the gui text to the time it took the player to complete the level
function PlayerCompletedGame() {
    guiText.text = Time.timeSinceLevelLoad.ToString();
}

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void PlayerCompletedGame() {
        guiText.text = Time.timeSinceLevelLoad.ToString();
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def PlayerCompletedGame():
        guiText.text = Time.timeSinceLevelLoad.ToString()