// Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Escape) && oldPath != null)
        {
            if (oldPath != null)
            {
                coloredPath(oldPath, Color.white);
            }
            startPosition    = null;
            endPosition      = null;
            oldStartPosition = null;
            oldEndPosition   = null;
            oldPath          = null;
        }

        if (startPosition != null && startPosition != oldStartPosition)
        {
            makeGraph();
            findPathes       = DijkstraAlgorithm.FindPathes(startPosition, otherGraph);
            oldStartPosition = startPosition;
        }

        if (endPosition != null && endPosition != oldEndPosition && startPosition != endPosition)
        {
            var path = findPathes.Find(e => e.Count > 0 && Equals(e[e.Count - 1], endPosition));
            if (path != null)
            {
                if (oldPath != null)
                {
                    coloredPath(oldPath, Color.white);
                    for (int j = 0; j < oldEndPosition.transform.childCount; j++)
                    {
                        oldEndPosition.transform.GetChild(j).GetComponent <SpriteRenderer>().color = Color.white;
                    }
                }

                fillOldPath(path);
                coloredPath(path, new Color(0, 255, 0, 0.5f));
                oldEndPosition = endPosition;
            }
        }
    }