Counter animation help

Hi,
this message goes out to anyone who may be able to help me! i am trying to do a flash animation with text. what i want to do is create a counter that goes from 1 to 30,000 is about thirty seconds. the problem is that i don’t want it to turn out looking morphed inbetween. is there a way to make it look like the numbers are flipping, from the ground up, while they change? any help or advice would be appreciated. thank you!
elena