Work Time Counter

Please ready with maximum atention. I need a program that can stay minimised in the system tray. Whenever the worker standup from the computer or the comuter has no activity ( no keyboard, or no mouse ) the system lock the computer. The program must count the working hours. I want to work like this: A worker must work 8 hours each day. starting hour is 9 o'clock in the morning. ( when he came in the work 5 minutes later I want a popup window to ask him the reason why he is late , the answer must be saved in a log file , maybe an encripted logfile ) Each seccond the program must told him how much he has to work ( in the 14 o'clock the program must say, you have another 4 hours to work ) When the 8 hours of work are finish the program must ask the user why him he is working over program and it have to log the answer and the number of hours they work overtime and also save them in the encrypoted log ) Any new Ideeas are good for this project. I am waiting for your answer. PLEASE ONLY SERIOUS BIDDERS! NO TIME WASTERS! *Budget its not something big cause this job will not take a loot of time for an experienced programmer in this type of job,but if you will make an amazing job you will get a decent bonus!