Javascript Basic Lap Timer with GUI

You're welcome to use mine. It's a little more complex and probably a little rough as I'm a bit of a noob but it does the job. It takes into account multiple laps and displays the last lap etc etc and can also detect if the lap was legitimate (though that needs tweaking). Take from it what you want ;-)

 // Public Variables
 var ValidLap : GameObject;
 var LapCounter : GameObject;
 var LapCounterText : GUIText;
 var LapCounterTextShadow : GUIText;
 var iStartSequenceTime : int = 9;
 var LapTimeText : GUIText;
 var LapTimeTextShadow : GUIText;
 var LastLapText : GUIText;        // Displays the previous lap time in the centre of the screen for the player
 var LastLapTextShadow  : GUIText;
 var iNumberOfLaps : int = 5;
 var fAllLapTimes : float[] = new float[iNumberOfLaps]; // An array to store all laptimes.
 
 
 // Private Variables
 private var bValidLapIsTrue = false;
 private var iCurrentLap : int = 1;
 private var iMinutes : int;
 private var iSeconds : int;
 private var iHundredths : int;
 private var iMinutes2 : int;
 private var iSeconds2 : int;
 private var iHundredths2 : int;
 private var fCurrentLapTime : float;
 private var fPreviousLap : float;        // Float to store the previous completed lap
 private var fLapTimeTotal : float;        // Container to store all previous laptimes together.
 private var bSetLapTime = false;
 private var bCurrentLapReset = false;
 
 
 
 function OnTriggerEnter(other : Collider)
 {
     if(other == ValidLap.collider)
     {
         if(bValidLapIsTrue)
         {
             bValidLapIsTrue = false;
         }
         else
         {
             bValidLapIsTrue = true;
         }
     }    
     
     if(other == LapCounter.collider && bValidLapIsTrue)
     {
         ++iCurrentLap;
         bValidLapIsTrue = false;
         bSetLapTime = true;
     }    
 }
 
 
 function Update()
 {
     // Update the onscreen lap counter
     LapCounterText.text = ("LAP " + (iCurrentLap));
     LapCounterTextShadow.text = ("LAP " + (iCurrentLap));
     
     if (LevelSetup.g_bGameInPlay)
     {
         if (!bCurrentLapReset)
         {
             fCurrentLapTime = Time.time - iStartSequenceTime; // Account for the starting sequence delay
         }
         else
         {
             // Reset the current lap timer, accounting for original start seq delay
             fCurrentLapTime = ((Time.time - fLapTimeTotal) - iStartSequenceTime);
         }
     }
     else
     {
         // Keeps timer at zero until game underway
         fCurrentLapTime = 0.0f;
     }
     
     // Lap timer
     iMinutes = (fCurrentLapTime /60f);
     iSeconds = (fCurrentLapTime  % 60f);
     iHundredths = ((fCurrentLapTime * 10) %10);
     LapTimeText.text = String.Format("{0:00}:{1:00}:{2:00}",iMinutes,iSeconds,iHundredths);
     LapTimeTextShadow.text = String.Format("{0:00}:{1:00}:{2:00}",iMinutes,iSeconds,iHundredths);
     
 
     // Set the previous lap time
     while (bSetLapTime)
     {
         fPreviousLap = fCurrentLapTime;
         print(fPreviousLap);
         bSetLapTime = false;
         fCurrentLapTime = 0.0f; // Reset the current Laptime
         bCurrentLapReset = true;
         fLapTimeTotal += fPreviousLap; // Adds to the total race time
         DisplayLapTime();
         
         if (iCurrentLap <= fAllLapTimes.Length) // So array doesn't go out of bounds
         {
             for (var i = 0; i < iCurrentLap; ++i)
             {
                 fAllLapTimes[i] = fPreviousLap; // Populate the array with lap times
                 print("Lap: " + fAllLapTimes[i]);
             }
         }
     }
 }
 
 
 function DisplayLapTime()
 {
     var LastLapTextCopy = Instantiate(LastLapText);
     var LastLapTextShadowCopy = Instantiate(LastLapTextShadow);
     
     iMinutes2 = (fPreviousLap /60f);
     iSeconds2 = (fPreviousLap  % 60f);
     iHundredths2 = ((fPreviousLap * 10) %10);
     
     for (var i = 0; i < 5; ++i)
     {
         LastLapTextCopy.text = ("LAST LAP: \n" + String.Format("{0:00}:{1:00}:{2:00}",iMinutes2,iSeconds2,iHundredths2));
         LastLapTextShadowCopy.text = ("LAST LAP: \n" + String.Format("{0:00}:{1:00}:{2:00}",iMinutes2,iSeconds2,iHundredths2));
     
         yield WaitForSeconds(0.5);
         
         LastLapTextCopy.text = (" ");
         LastLapTextShadowCopy.text = (" ");
         yield WaitForSeconds(0.5);
     }
     
     
     yield WaitForSeconds(3.0f);
     Destroy(LastLapTextCopy);
     Destroy(LastLapTextShadowCopy);
 }