void ResetAll()
{
for (int i = 0; i < mapController.spots.GetLength(0); i++)
{
for (int j = 0; j < mapController.spots.GetLength(1); j++)
{
Destroy(mapController.spots [i, j].gameObject);
}
}
mapController.Start();
openSet.Clear();
closedSet.Clear();
pathFound = false;
}