public SleepCommand(long milliseconds, ActiveObjectEngine engine, Command wakeupCommand)
{
this.engine = engine;
sleepTime = milliseconds;
subCommand = wakeupCommand;
}
static void Main(string[] args)
{
Command wakeup = new WakeUpCommand();
var e = new ActiveObjectEngine();
Command sleepCommand = new SleepCommand(1000, e, wakeup);
e.addCommand(sleepCommand);
long start = DateTime.Now.Second;
e.run();
long end = DateTime.Now.Second;
long sleepTime = end - start;
Console.WriteLine($"SleepTime is {sleepTime}");
}