First thing you want to do is get a clock kit from Walmart. They cost about $5. Then you’ll also need an 8″ rotor (used), and 2 (1 1/2″ washers).
I had to drill out the hole of the washer to a 1/2″ diameter so I could get it to fit the click fittings.
I then followed the directions on assembling the clock. But I placed one washer behind the rotor and another in front of it to secure it from moving. Now I could place the number for the clock.
I decided to only go with the 12, 3, 6, and 9 for a cleaner look. Voila!