Hello, I am gladly at your service.
Hi, I can build this without any problems in Flash for you. I am thinking at a smart framework where you will have one PLUS button that will add another timer component on the page.
When you will add another timer, you will be able to set the initial countdown clock and either start that individual timer right then with a "Start timer button" or I can have a global button that will start all timers at the same time ( or pause ).
For each timer, after you setup the initial value, you will be able to add more to it. I am thinking at some small buttons that when pressed will add 1 minute / 10 minutes / 30 seconds... to the timer. Just tell me how many of these small buttons you need and the value for each and I can do it.
After a timer is completed, the box that contains it will Flash with a red color or something.
Thank you for considering my bid.
TIMER