AStartTest.Form1.timer1_Tick C# (CSharp) Method

        private void timer1_Tick(object sender, EventArgs e)
        {
            aStar = new AStar(tileMap);
            List<Tile> path = aStar.FindPath();

            int index = r.Next(path.Count);

            if (path.Count > 0)
            {
                while (path[index].TileType == TileType.Goal || path[index].TileType == TileType.Start ||
                    index == path.Count - 2 || index == 1)
                {
                    index = r.Next(path.Count);
                }
                blocked.Add(path[index]);
                panel33_MouseDown(path[index].Panel, null);
                ExecuteAStar();
            }
            else
            {
                int count = 0;
                int index2;
                int minRemove = blocked.Count / 3;
                while (path.Count == 0 || count < minRemove)
                {
                    index2 = r.Next(blocked.Count);
                    panel33_MouseDown(blocked[index2].Panel, null);
                    blocked.RemoveAt(index2);

                    ExecuteAStar();
                    aStar = new AStar(tileMap);
                    path = aStar.FindPath();

                    count++;

                }

            }
        }