Busy Status Bar

I might buy this to use as follows.

I want a work-time tracker that lights a bright LED every 5 minutes or so, and as long as I'm there and working I smash a button and the light goes off for another 5 minutes. Some algorithm tracks the times I have hit the button and displays how long I have been working on said task.

I'm picturing something fairly cheap, like a stop watch or 3 button kitchen timer. A LED, a few buttons, a LCD display, a AAA battery slot, and an internal timing circuit is all that's needed (and a case to hold it together).

This would basically be a stop watch that stops on its own if neglected, and I can imagine a few uses for it.

Add an alarm to play VERY LOUD if the button is not pressed in a 5-7 minute window to keep you working. If you fail to do so the entire office/house has to hear your alarm going off