static void Main(string[] args)
        {
            Watcher     watcher1    = new Watcher("Watcher1");
            Watcher     watcher2    = new Watcher("Watcher2");
            Watcher     watcher3    = new Watcher("Watcher3");
            TrainingGuy trainingGuy = new TrainingGuy();

            trainingGuy.Subscribe(watcher1);
            trainingGuy.Subscribe(watcher2);
            trainingGuy.Subscribe(watcher3);
            WorkoutController fitnessInstructor = new WorkoutController();

            SwitchDownCommand switchDownCommand = (SwitchDownCommand)CommandFactory.Create(CommandFactory.commandList.SwitchDown, trainingGuy);
            SwitchUpCommand   switchUpCommand   = (SwitchUpCommand)CommandFactory.Create(CommandFactory.commandList.SwitchUp);

            switchUpCommand.SetTrainingGuy(trainingGuy);

            fitnessInstructor.SetCommand(switchUpCommand);
            fitnessInstructor.ExecuteCommand();

            fitnessInstructor.SetCommand(switchDownCommand);
            fitnessInstructor.ExecuteCommand();

            fitnessInstructor.SetCommand(switchUpCommand);
            fitnessInstructor.ExecuteCommand();
        }