private MenuBar initMenu() {
    MenuBar bar = new MenuBar();
    bar.setPadding(new Insets(5));
    bar.setStyle("-fx-background-color: #3C4346;");

    Menu menuTasks = new Menu("Tasks");
    Menu menuPeople = new Menu("People");
    Menu menuShop = new Menu("Shop");

    MenuItem itemCashRegister = new MenuItem("Cash Register");
    MenuItem itemStocker = new MenuItem("Stocker");
    itemCashRegister.setOnAction(e -> checkoutWindow());
    itemStocker.setOnAction(e -> stockerWindow());

    MenuItem itemEmployees = new MenuItem("Employees");
    MenuItem itemCustomers = new MenuItem("Customers");
    MenuItem itemIceCream = new MenuItem("Ice Cream");
    itemIceCream.setOnAction(e -> IceCreamWindow());
    itemEmployees.setOnAction(e -> employeesWindow());
    itemCustomers.setOnAction(e -> customerWindow());

    MenuItem itemOverview = new MenuItem("Shop Overview");
    MenuItem itemEnd = new MenuItem("End Game");
    itemOverview.setOnAction(e -> shopoverviewWindow());
    itemEnd.setOnAction(e -> endGame());

    menuTasks.getItems().addAll(itemCashRegister, itemStocker, itemIceCream);
    menuPeople.getItems().addAll(itemEmployees, itemCustomers);
    menuShop.getItems().addAll(itemOverview, itemEnd);

    bar.getMenus().addAll(menuTasks, menuPeople, menuShop);

    return bar;
  }