Timer Web App
Here's the basis of the application. It's actually to help keep time with football practice.
Basically, I'll type in
15 min of this period
20 min of this period
30 min of this period
Then, the program calculates the times when I hit the "Start" button. And it alerts us when there are 5 minutes left in the period, 1 minute in the period, and the end of the period.
I've attached what I have so far.