TitleScreen.OnGUI C# (CSharp) Method

    void OnGUI()
    {
        int sw = Screen.width;
        int sh = Screen.height;
        GUILayout.BeginArea(new Rect(0,sh/2,sw,sh));
        GUILayout.BeginHorizontal();

        if (GUI.Button( new Rect(sw/4,0,sw/2,sh/4), start_im)) {
            Application.LoadLevel("Stage1");
            Instantiate(GameObjectPrefab,new Vector3(0,0,0), Quaternion.identity);
        }
        if (GUI.Button( new Rect(sw/8*1,sh/4,sw/4,sh/6), tutorial_im)) {
            Application.LoadLevel("Tutorial");
        }
        if (GUI.Button( new Rect(sw/8*3,sh/4,sw/4,sh/6), score_im)) {
            Application.LoadLevel("Record");
        }
        if (GUI.Button( new Rect(sw/8*5,sh/4,sw/4,sh/6), option_im)) {
            Application.LoadLevel("Option");
        }
        GUILayout.EndHorizontal();
        GUILayout.EndArea();
    }