Cluster Ring

******   ******   ******    *****   *     *   *****    *****   
*     *  *     *  *     *  *     *  *   **   *     *  *     *  
*     *  *     *  *     *  *        * **     *        *        
******   *     *  ******   *        **        *****    *****   
*   *    *     *  *        *        * **           *        *  
*    *   *     *  *        *     *  *   **   *     *  *     *  
*     *  ******   *         *****   *     *   *****    *****