Hexagon Stackable Ring

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