rinoel -1 Newbie Poster

Hi there, this is my first topic to daniweb eventhough I read this forum everyday, well I have a question:

I have a task to do, I need to simulate seconds (phone calls), for example if i have 5$ telephone credit, it should do smthing like (credit - talkingSeconds), but if someone can help me to find out how to simulate (impulses) seconds for phone calls it would be great.
thnx in advance...