extern short Ur[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern short Hit[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern short Box[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern short Ur[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern short Hit[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern short Box[MAX_LEV_FIELDX][MAX_LEV_FIELDY];