Please, need help, creating a counter that goes up all the time

The basic idea is to have an odometer type thing, that would go up 9 times a second, and it would go up whether you are on the site or not.

So if I started it now, and checked back in on the site in a couple of days it would be at say 300,000, and then I would check back in a couple days later and it might be at 600,000.

How would I go about doing this. I have an mc with the actual digit animations…but what code could make this happen?

Thanks.