private void ClearAll()
{
for (int i = 0; i < Spikes.GetLength(0); i++)
{
for (int j = 0; j < Spikes.GetLength(1); j++)
{
Spikes[i, j].PreviewMode = false;
Spikes[i, j].OutMode = false;
Spikes[i, j].Marked = false;
}
}
}
