Countdown display for final seconds only?

[cpil]

Here is some sample HTML code that you could use to display the 30 second timer. Before that, you could just display a blank HTML page that does an auto-redirect after 270 seconds. i.e., an auto-redirect to the 30 second countdown html page. Know what I mean? If not, feel free to ask for elaboration!! You could also play with the formatting in this attached sample--it's pretty bare-bones.

Hope it helps!
-Blair

Oh awesome! I'll see if I can make it work when I'm back in the lab tomorrow, thank you!