******************************
*        0         1       2 *          
*        3
*        6
*        9
*       12
*       15                              **********
----------                                     2 *
                                               5 *
                                               8 *
                            16      17 *      11 *
                    --------------------      14 *
                    *       15        16      17 *
                    ------------------------------

      4.00      8.00     12.00     16.00     20.00     24.00