Help With Quickest TimeScore

I'm trying to save the time in which it took to complete the level and then after that if the beat there time i want it to save that too, i have tried using player prefs but i just carnt figure it out.
Any help would go a long way thank you.
The script im using for the time is below for you to look at if it helps figure out.

 var intsec : int; //this variable is to Count in intergurs which basically means counting in whole number such as 1, 2, 3  
 var minutes = 0; //this variable Counts the minutes  
 var seconds; //this variable Counts the Seconds  
 var TimeScore : TextMesh; //Printing the time since level loads  
 var TimeText = "Time: 0"; //Adding Extra text to the time so that it displays Time:  
 //Variables for Counting Coins  
 var PlayerScore : int; //this is a variable that can be incremented by whole numbers to count the coins  
 var ScoreText = "Coins: 0"; //Adding Extra text to the Coins so that it displays Coins:  
 public var other : GameObject; //this is so that the coin disappears when it collides with the player  
 var CoinScore : TextMesh; ////Printing the Coins When Collected  
 var highscore : int;  
 var CurrentLvl : int;  
   
  function Update() { //Updating continuously  
  sec = sec + Time.deltaTime; //Counts the seconds since object spawn  
  intsec = sec; //turns the sec variable from a float which is things like 4.0, 5.0 to an int like 1, 2, 3, 4  
    
   if(intsec < 10) //this is saying that if the intsec variable is more than 10 do the statement below  
   {  
    seconds = "0"+intsec;   
   }  
   else  
   {  
    seconds = intsec;  
   }  
    
   if(intsec >= 60)  
   {  
    minutes++;  
    sec=0;  
   }  
     
   TimeText = "Time: " + minutes + ":" + seconds;  
  {  
  TimeScore.text = TimeText;  
  }  
 {  
  CurrentLvl = Application.loadedLevel;  
     PlayerPrefs.SetInt("CurrentLevel", CurrentLvl);   
     }  
     {  
     if (CurrentLvl == 1 && PlayerPrefs.GetInt("CoinTotalLvl1") < PlayerScore) {  
     PlayerPrefs.SetInt("CoinTotalLvl1", PlayerScore);    
     }  
     {  
     if (CurrentLvl == 1 && PlayerPrefs.GetInt("Lvl1Comp") == 1){    
     PlayerPrefs.SetInt("MinutesLvl1", minutes);  
     PlayerPrefs.SetInt("SecondsLvl1", intsec);  
     }  
   }  
 }  
 }   
 //Coin Counting and Printing out number  
 function OnTriggerEnter2D(other : Collider2D){  
 if (other.tag == "coin"){  
     PlayerScore +=1;  
     ScoreText = "Coins: " + PlayerScore;  
     CoinScore.text = ScoreText;  
     other.gameObject.active = false;  
 }  
 }