private void ChangeType()
        {
            int newType = (int)type + 1;

            if (newType > 2)
            {
                newType = 0;
            }

            type = (NodeDemoType)newType;
            PaintByType();
        }
 public void ResetType()
 {
     type = 0;
     PaintByType();
 }
 private void Start()
 {
     type = NodeDemoType.Empty;
 }