Menu of Graphics

How do I when you click "" to appear for settings graphics, example "graphic, good, simple, good" Note: I'm Brazilian , and the have to be modifiable with GUI STYLE #pragma strict //Carregar outra cena private var isLoading = false;

 //Config.
 var posiX: float;
 var posiY: float;
 
 var altura: float;
 var largura: float;
 
 var perSkin : GUISkin;
 
 var controlePause: boolean;
 
 var ObSalvar: Salvar;
 
 var nSave: String;
 
 
 function Start () {
 ObSalvar = gameObject.AddComponent(Salvar);
 altura  = 70;
 largura = 150;
 
 posiX = Screen.width/2 - largura/2 ; 
 posiY = Screen.height/2- altura /2 + 90;
 controlePause = true;
 
 }
 
 function Update () {
 if(Input.GetKeyDown(KeyCode.Escape))
   if (controlePause)
   {
     Time.timeScale = 0;
     controlePause = false;
   }
   else
   {
     Time.timeScale = 1;
     controlePause = true;
   }
   
 }
 
 
 function OnGUI()
 {
 GUI.skin = perSkin;
   if (!controlePause)
   {
     GUI.Box(Rect(0,0,Screen.width,Screen.height)," ");
     if (GUI.Button(Rect(posiX,posiY,largura,altura),"Graficos"))
      {
        var names = QualitySettings.names;
         GUILayout.BeginVertical ();
         for (var i = 0; i < names.Length; i++)
         {
             if (GUILayout.Button (names[i]))
                 QualitySettings.SetQualityLevel (i, true);
         }
         GUILayout.EndVertical ();
      }
     if (GUI.Button(Rect(posiX,posiY+altura+10,largura,altura),"Sair"))
      {
        isLoading = true;
        Application.LoadLevel("Menu Inicial");
      }
      
  {
       //controlePause = !controlePause;
       
       nSave = ObSalvar.VerificaSave();
       print(nSave);
       
  }
 
      
    }
 }