The screenshots show EXACTLY what I am using it for. It is sitting in my tray with those settings.
I had a digital post-it note with an alarm set to go off hourly, but the sound it made was a little tinkling bell which rings only once and it shows a tiny little flashing clock in the bottom right corner of my screen...small like a 16x16 icon... just a little red dot.
It was much too easy to ignore. I need something much louder and more obnoxiously in my face for it to be effective, especially if I have stepped away from my pc for something.