I need to create a rolling log of sorts. What i need to track is when an employee has reached 16 hours time worked within the last 24 hours period. The 16 hours worked is not always continious. I need something that they can keep a log of, and when they reach 16 hours, have buzzers and alarms go off, lol. preferably warning once 14 and 15 hours are reached also. Pretty new to excel but any help would be greatly appreciated.