public void RestartSearch()
{
m_grid.CleanupGrid();
m_grid.ResetNeighbours();
m_frontierNodes.Clear();
m_frontierNodes = new PriorityQueue <Node>();
m_exploredNodes.Clear();
m_exploredNodes = new List <Node>();
m_pathNodes.Clear();
m_pathNodes = new List <Node>();
ShowColors();
}