Delayed event

class asdasd : public WorldScript
{
public:
    asdasd() : WorldScript("asdasd"){}

    void OnStartup()
    {
        Events.ScheduleEvent(COUNTDOWN_60,60000);
        Events.ExecuteEvent();
    }

    void OnUpdate(uint32 diff)
    {
        Events.Update(diff);
        while (uint32 eventId = Events.ExecuteEvent())
        {
            switch (eventId)
            {
            case COUNTDOWN_60:
                {
                    sWorld->SendServerMessage(SERVER_MSG_STRING, "|cffffcc00[PvP Event Announcer]:|r|cFF8B0000The 1 versus 1 PvP event countdown is starting in 1 minute !");
                    Events.ScheduleEvent(COUNTDOWN_30, 30000);

                }break;
            case COUNTDOWN_30:
                {
                    sWorld->SendServerMessage(SERVER_MSG_STRING, "|cffffcc00[PvP Event Announcer]:|r|cFF8B0000The 1 versus 1 PvP event countdown is starting in 30 seconds, contestors be ready!");
                }
                break;
            }
        }
    }

private:
    EventMap Events;

    enum eEvents
    {
        COUNTDOWN_60 ,
        COUNTDOWN_30
    };

};