void Board::initBoard(){
    emptyCell.clear();

    for (int i = 0; i < BOARD_HEIGHT; i++){
        for (int j = 0; j < BOARD_WIDTH; j++){
            boardM[i][j] = 0;
            Cell c;
            c.posX = i;
            c.posY = j;
            emptyCell.push_back(c);
        }
    }
}

void Board::randomBall(){
    srand (time(NULL));

    int prand =  rand() % emptyCell.size();
    boardM[ emptyCell[prand].posX ][ emptyCell[prand].posY ] = rand() % 6 + 1;

    emptyCell.erase(emptyCell.begin() + prand);
}