public static void NextLesson()
    {
        FlowControl.MenuState = false;
        List <Lesson> lessons = CustomLessons.GetInstance().GetLessons();

        int index = -1;

        for (int i = 0; i < lessons.Count; i++)
        {
            if (lessons[i].GetSceneName().Equals(currentSlides.GetSceneName()))
            {
                index = i;
                break;
            }
        }

        if (index != -1 && index + 1 < lessons.Count)
        {
            //FlowControl.SetLesson(lessons[index+1].GetSceneName());
            //Application.LoadLevel ("Lesson_Loader");
            GoToLessonScreen();
        }
        else
        {
            GoToLessonScreen();
        }
    }
    // Use this for initialization
    void Start()
    {
        // Create a list of lessons
        List <Lesson> lessons = CustomLessons.GetInstance().GetLessons();

        // Create Go Back to Menu Button
        GUIButton goBack = new GUIButton();

        goBack
        .SetText("Go Back to Main Menu")
        .OnClick(FlowControl.ShowMainMenu)
        .SetBox((new Box())
                .SetMarginTop(0.0f)
                .SetMarginRight(0.0f)
                .SetMarginBottom(0.0f)
                .SetMarginLeft(0.0f));

        // Create "Help" Button
        GUIButton helpButton = new GUIButton();

        helpButton
        .SetText(GUIConst.helpButtonText)
        .OnClick(FlowControl.ShowHelpMenu)
        .SetBox((new Box())
                .SetMarginTop(0.0f)
                .SetMarginRight(0.0f)
                .SetMarginBottom(0.0f)
                .SetMarginLeft(0.0f));

        GUIFactory factory = new GUIFactory();

        factory
        .Append(new GUIImage("splash-background"));

        // Attach them to a "Lesson Scroll Area"
        factory
        .CreateScrollArea()
        .SetBox((new Box())
                .SetMarginBottom(0.1f)
                .SetMarginTop(0.1f)
                .SetMarginLeft(0.1f)
                .SetMarginRight(0.1f))
        .Append(new GUILessonList(lessons));

        factory.CreateContainer()
        .SetBox((new Box())
                .SetMarginTop("auto")
                .SetMarginLeft("5px")
                .SetMarginBottom("5px")
                .SetMarginRight("auto")
                .SetHeight(0.08f)
                .SetWidth(0.4f)).Append(goBack);

        factory
        .CreateContainer()
        .SetBox((new Box())
                .SetMarginTop("auto")
                .SetMarginLeft("auto")
                .SetMarginBottom("5px")
                .SetMarginRight("5px")
                .SetHeight(0.08f)
                .SetWidth("32px"))
        .Append(helpButton);

        // Build
        gui = factory.Build();
    }