void forest::setOnFire(vector<vector<int>> &vec)
{
   for (int y = 0, n = 12; y < n; y++){
        for (int x = 0, p = 16; x < p; x++){
            if (vec[y+1][x] == 1)
            {
                vec[y][x] = 1;
            }
            if (vec[y-1][x] == 1)
            {
                vec[y][x] = 1;
            }
            if (vec[y][x+1] == 1)
            {
                vec[y][x] = 1;
            }
            if (vec[y][x-1] == 1)
            {
                vec[y][x] = 1;
            }
            else{
                return;
            }
        }
    }
}

QTimer* fireTimer = new QTimer(this);
       connect(fireTimer, SIGNAL(timeout()),this,SLOT(setOnFire()));
       fireTimer->start(1000);