Hit the button a gazillion times then you'll wait the amount of seconds milliseconds so if it's 12:59:59 then you'll have to wait 59 milliseconds even it's already about 1:00:00 (why not?). Sorry :( *WARNING*: CONTAINS FLASHY MOVEMENT, ERASING AND WRITING WITH A LOT OF PEN *BEWARE* Press m in digital mode for base 12 and n in digital mode for base 24.
I wanted to make a 100% clock in scratch and I did it in 1 day, well about 5 hours of waiting and testing.
