Change 12 hour code to 24 hour code

@cattledog a normal clock jumps to 0:00 at midnight and not like mine to 00:00

and that is what I want to change so that my clock also jumps at 0:00 at midnight and not to 00:00

@ remington the clock is running well now with 24 hour indication only if it is midnight it actually indicates a zero too much.and that is the first 7segment this should not light up until 10:00 am