Chain

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