Only 2 functions were needed, one was the mod function and the other is the DateTimeDiff function. Combining the 2 function gives you the difference in the hours, minutes and seconds. But make sure you give the right mod, I gave the mod for hours a 24 because we only have 24 hours in a day, mod for minutes of a 60 because you only have 60 minutes in an hour, and a mod of 60 for seconds because theres only 60 seconds in a minute.