combination lock with a feedback

Hello,

I´m looking for a combination lock, where you get a feedback for what you pressed. For each number, you should get a response. Like the searched number is higher then the pressed key or the pressed key is the searched number.

  var currentCombination : int = 0;
  private var correctCombination : int = 621;
  private var attempts : int = 10;
  var buttonClickProgress : int;
 
 
 
  
  function OnGUI() {
  if(GUI.Button(Rect (0,0, 50, 50), "0")){ ButtonWasClicked(0); }
  if(GUI.Button(Rect (50,0, 50, 50), "1")){ ButtonWasClicked(1); }
  if(GUI.Button(Rect (100,0, 50, 50), "2")){ ButtonWasClicked(2); }
  if(GUI.Button(Rect (0,50, 50, 50), "3")){ ButtonWasClicked(3); }
  if(GUI.Button(Rect (50,50, 50, 50), "4")){ ButtonWasClicked(4); }
  if(GUI.Button(Rect (100,50, 50, 50), "5")){ ButtonWasClicked(5); }
  if(GUI.Button(Rect (0,100, 50, 50), "6")){ ButtonWasClicked(6); }
  if(GUI.Button(Rect (50,100, 50, 50), "7")){ ButtonWasClicked(7); }
  if(GUI.Button(Rect (100,100, 50, 50), "8")){ ButtonWasClicked(8); }
  if(GUI.Button(Rect (0,150, 50, 50), "9")){ ButtonWasClicked(9); }
  
  GUI.Box(new Rect(200,100,200,30),"Versuche: " + attempts);
  
  GUI.Box(new Rect(200,50,100,30),"Ziffer 1: ");
  GUI.Box(new Rect(300,50,100,30),"Ziffer 2: ");
  GUI.Box(new Rect(400,50,100,30),"Ziffer 3: ");
  
  
  }
  
  function ButtonWasClicked (buttonNmb : int) {
  
  currentCombination += buttonNmb;
  
     buttonClickProgress++;
  
  if(buttonClickProgress < 3){
      currentCombination *= 10;
     
         
  }
       
  else{
      if(currentCombination == correctCombination){
          Debug.Log("You Opened the Combination lock!");
          buttonClickProgress = 0;
          currentCombination = 0;
      }
      else{
          Debug.Log("Wrong Combination Code, reseting...");
          buttonClickProgress = 0;
          currentCombination = 0;
          attempts = attempts -1;
          }
         if(attempts == 0){
             Debug.Log("You have now make 10 attempts!! You have lose the game!");
         }
         
         
      }
 
  
  }
  

Does anyone know, how to do it? The feedback must not be on a HUD/GUI, but its nice to have.