I am designing a digital clock with binary counters for a digital electronics class. I can not figure out how to get the divide by 12 hour section. I am having trouble having the counter reset at 9, then reset again at 12. I am also having trouble presetting the counter to a 1, but letting it go to 0 for 10, then presetting back to 1, since there is no hour 00 , I want it to go 01, 02, 03, 04, 05, 06, 07, 08 , 09, 10, 11, 12, 01....