各位高手请看:
 
   1.the balck pushbutton starts the display. the red pushbutton terminates the   display.
   2.After the start, the" moving row" sequence is displayed. Each row of lamps is lit for 0.5s, starting from the bottom row up. there are no intervals between the illuminations of successive rows. this sequence is displayed five times.
   3.Two seconds after completion of the above process, three letters representing the initials of the group members are displayed in a sequence. Each letter flashes three time in a row. Each flash last for 1 second. the interval between flashes is 0.5s. the letter sequence is repeated continuously untill the red button is depressed.
  4. the word display can be arrested at any stage with the white pushbutton. As a result, the letter currently lit will stay on untill the black pushbutton is depressed causing the sequence to be resumed.