Propeller Clock with Arduino Nano

I'm working on 8 leds propeller clock with arduino uno.

Define what a propeller clock is, please.

I wrote a code but it's not completed. Please help for rest of the code.

When is our homework due?

Code that I wrote :

The code AS YOU POSTED IT won't even compile. Not that posting properly (using the # icon) would have helped.

digits[k][i];

is about as useful as

0xBE;

which, of course, accomplishes nothing.