static void Main(string[] args)
{
Light light = new Light();
RemoteControl remoteControl = new RemoteControl();
remoteControl.SetCommand(0, new LightOnCommand(light));
remoteControl.SetCommand(1, new LightOffCommand(light));
remoteControl.OnButtonClick(0);
remoteControl.OnButtonClick(1);
remoteControl.OnClickUndo();
}