public void Link(Square neighbour, Direction dir)
{
}
private void SetLink(Square square, Direction dir, int x, int y)
{
int dirX = (width + x + dir.DeltaX) % width;
int dirY = (height + y + dir.DeltaY) % height;
Square neighbour = grid[dirX, dirY];
square.Link(neighbour, dir);
}