void Start()
{
allRooms = new List <SubDungeon>();
root = new SubDungeon(new Rect(0, 0, boardRows, boardColumns));
CreateBSP(root);
root.CreateRoom();
root.ListRooms(root, allRooms);
chooseRooms();
boardPositionsFloor = new GameObject[boardRows, boardColumns];
DrawRooms(root);
DrawCorridors(root);
placePlayer();
MakeWalls();
}