i write this script but have a litle error and i dont know whi? this is the error Assets/Inventar.js(52,10): BCE0044: expecting (, found 'OnGUI'.

pragma strict

var menuSkin : GUISkin;

var Wood : int = 0; var Stone : int = 0; var Stick : int = 0;

var minimumVal : int = 0;

private var showGUI : boolean = false;

private var playerGUI : PlayerGUI;

function Start() { playerGUI = GameObject.Find("First Person Controller").GetComponent(PlayerGUI);
} function Update() { if(wood <= 0) { wood = minimumVal; }

 if(stone <= 0)
 {
     stone = minimumVal;
 }
 if(stick <= 0)
 {
     stick = minimumVal;
 }
 if(Input.GetKeyDown("i"))
 {
     showGUI = !showGUI;
 }
     if(showGUI == true)
 {
     Time.timeScale = 0;
     GameObject.Find("First Person Controller").GetComponent(FPSInputController).enabled = false;
     GameObject.Find("First Person Controller").GetComponent(MouseLook).enabled = false;
     GameObject.Find("Main Camera").GetComponent(MouseLook).enabled = false;
     }
     if(showGUI == false)
 {
     Time.timeScale = 1;
     GameObject.Find("First Person Controller").GetComponent(FPSInputController).enabled = true;
     GameObject.Find("First Person Controller").GetComponent(MouseLook).enabled = true;
     GameObject.Find("Main Camera").GetComponent(MouseLook).enabled = true;

}

function OnGUI(); ----this is the error

{ if(showGUI == true) { GUI.skin = menuSkin; GUI.BeginGroup(new Rect(Screen.width / 2 - 150, Screen.height / 2 - 150, 300, 300)); GUI.Box(Rect(0, 0, 300, 300), "Basic Inventory");

             //Resources collected
             GUI.Label(Rect(10, 50, 50, 50), "Wood");
             GUI.Box(Rect(60, 50, 20, 20), "" + wood);
             
             GUI.Label(Rect(90, 50, 50, 50), "Stone");
             GUI.Box(Rect(130, 50, 20, 20), "" + stone);
             
             GUI.Label(Rect(90, 50, 50, 50), "stick");
             GUI.Box(Rect(130, 50, 20, 20), "" + stick);
                 }
             }
             GUI.EndGroup();

}