public void init() {
        screen = new ScreenManager();
        DisplayMode displayMode =
            screen.findFirstCompatibleMode(POSSIBLE_MODES);
        screen.setFullScreen(displayMode);

        Window window = screen.getFullScreenWindow();
        window.setFont(new Font("Dialog", Font.PLAIN, FONT_SIZE));
        window.setBackground(Color.blue);
        window.setForeground(Color.white);

        isRunning = true;
    }