private void echo () {
        String command ;
        String command2;
        ui.display();
        ui.displayString("ECHO MODE");
        do {
            command = ui.getCommand();
        ui.displayString(command);
        } while (!command.equals("quit"));
        {
            ui.displayString("The game is over.");
        }
        do{
            command = ui.getCommand();
            ui.displayString(command);
        }while (!command.equals("help")||(!command.equals("buy"))||(!command.equals("roll"))||(!command.equals("done"))||(!command.equals("property"))||(!command.equals("balance")));
        {
            ui.displayString("Please enter a valid command");
        }


        return;