Pause button Help (need it to disappear after use)

I have a clickable pause button that i'm using a gui texture, and putting all my scripts in. what is happening is i click on it and my pause menu come up but i cant get it to disappear from my screen. what i would like is a touch of a finger and touch of a mouse i don't know if that possible if you could help me i would appreciate it!

--First script--

 var guiSkin: GUISkin;
 var PB : boolean;
  
 function Update()
 {
     if(PB != PButton.PButtons)
     {
         PB = PButton.PButtons;
     }
     if(PB == true)
     {
         Time.timeScale = 0.0;
     }
     if(PB == false)
     { 
         Time.timeScale = 1.0;  
     } 
 }
  
 function OnGUI ()
 {
    // we need to draw up a gui for the pause botton a box of some sort and a better
    //quit and continue botton.
     GUI.skin = guiSkin;
  
     if(PB == true)
     {
       if(GUI.Button (Rect(Screen.width/1.6-Screen.width/15,Screen.height/2-50,Screen.width/8,Screen.height/8), "Quit"))
       {
          Application.Quit();
       }
       
       if(GUI.Button (Rect(Screen.width/3.1-Screen.width/65,Screen.height/2-50,Screen.width/8,Screen.height/8), "Continue"))
       {
          Time.timeScale = 1.0;
          PB = false;   
       }
       if(GUI.Button (Rect(Screen.width/2-Screen.width/15,Screen.height/2-50,Screen.width/8,Screen.height/8), "Choose Level"))
       {
          Time.timeScale = 1.0;
         PB = false;
       }
    }
 }

--Second script--

 #pragma strict
 static var PButtons: boolean;
 
 function OnMouseDown()
 { 
 PButtons = true;
 }