extern short Back[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern boolean Stop[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern boolean Pushed[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern short Back[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern boolean Stop[MAX_LEV_FIELDX][MAX_LEV_FIELDY];
extern boolean Pushed[MAX_LEV_FIELDX][MAX_LEV_FIELDY];