What do I add to this script, so if you clicked the button ex. 30 times, a gui.box will appear?

 var clickCounter: int; 
 var mySkin : GUISkin;
 
  
 
  
 
 function OnGUI () {

 
     if (GUI.Button(Rect(Screen.width / 2, Screen.height / 2, 100, 30), "Wictors:  " + clickCounter)) { 
 
 
         clickCounter ++;
 
     }
     GUI.skin = mySkin;
     GUI.Box (Rect (10,10,240,100), "testytest");
     
 
 }

What can I add, so if you clicked a specified number of times, something will happend. I'm just stuck with how I should get it to count them and activate when it hits a number. Any tips? Thanks in advance