void main()
{
    object oArea = GetArea(OBJECT_SELF);
    int iSong = GetLocalInt(OBJECT_SELF, "SONG");
    if (iSong == 0)
    {
        MusicBackgroundStop(oArea);
        return;
    }
    MusicBackgroundStop(oArea);
    MusicBackgroundChangeDay(oArea, iSong);
    MusicBackgroundChangeNight(oArea, iSong);
    MusicBackgroundPlay(oArea);
}