private void updateDistances() {
        clearDistances();
        Queue<Cell> q = new LinkedList<>();
        gameBoard[human.getRow()][human.getCol()].setDistance(0);
        q.add(gameBoard[human.getRow()][human.getCol()]);
        while(!q.isEmpty()) {
            Cell curr = q.peek();
            q.remove();
            for(int i = -1; i <= 1; i++) {
                for(int j = -1; j <= 1; j++) {
                    if(isValidCell(curr, i, j)) {
                        gameBoard[curr.getX() + i][curr.getY() + j].setDistance(curr.getDistance() + 1);
                        q.add(gameBoard[curr.getX() + i][curr.getY() + j]);
                    }
                }
            }
        }
    }
    private void clearDistances() {
        for(int i = 0; i < BOARD_SIZE; i++)
            for(int j = 0; j < BOARD_SIZE; j++)
                gameBoard[i][j].clearDistance();
    }