^                                                t                            
  |                                          t     t                            
  |                                          t  t  t                            
  |                                 t     t  t  t  t              t             
  |                        t     t  t  t  t  t  t  t     t  t  t  t             
  |                        t  t  t  t  t  t  t  t  t  t  t  t  t  t  t          
  |                     t  t  t  t  t  t  t  t  t  t  t  t  t  t  t  t          
  |              r      t  t  t  t  t  t  t  t  t  t  t  t  t  t  t  t  t       
  |              rt  t  t  t  t  t  t rt  t  t  t  t  t  t  t  t  t  t  t       
  |   t     t  t rt  t  t  t  t  t rt rt  t rt rt  t rt  t  t  t  t  t  t  t    
 -+---------------------------------------------------------------------------> 
  |  02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 01