def createEvents(db, currDay, Period, Event):
    periods = Period.query.all()
    for period in periods:
        q = db.session.query(Event).filter(Event.scheduled_date == currDay).filter(Event.period_num == period.period)
        isEventsExist = db.session.query(q.exists()).scalar()
        if isEventsExist == False:
            event = Event(scheduled_date=currDay,
                          period_num=period.period
            )
            db.session.add(event)
            db.session.commit()