Bulloni movimento

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