Inside the clock's tick a short needle and long needle. John is a short needle points to the city. 

So when you point to 1: 1, John 3 o'clock hovering over 3:00. John pointed to a minute long needles. 

So when you point to 15 minutes, that's 30 minutes hovering over a six. And this is a long needle points

to 12 to 60 minutes I called on time. Short needle and long needle'm running every day.

Long needles around the wheel 60 through the small compartment by a large number of short needles Is Khan. 

So I an hour to 60 minutes. Another day is a day do two laps around the needle then a short 24 hours.