Countdown Programming

[Dueport]

Apologies for the newbie question but I'm confused with the countdown experience programming.  If I want to program say, a 1 minute timer, then under programming I can program off the 1min countdown event - but I'm hung up on what the action should be to program.  I don't see a start timer or condition of timer expired action off the countdown experience driver.  

Am I missing something there?  Or would I just create a timer agent for one minute and then program off the expiration of that?  So:

Event (from countdown experience): countdown 1min from [room]->Countdown

Action: start timer "Countdown 1 min"

Event (from "Countdown 1min" timer): when timer "countdown 1 min" expires

Action: play announcement with a timer buzzer in that room