I need something easy or easy to write about about the use of the circuit. Following the stopwatch suggestion could be that because (not even my explanation could be correct) the counter has four inputs (A,B,C and D), the A counts for 1, B = 2, C = 4 and D = 8 (not sure what these are called, logics?). And in relation to truth tables, the counter will display up to the number 15. So it could count up to 15 and because the user can reset it, it will go back to zero. Would this be acceptable do you think? Obviously I will include a lot more detail in my write up, but am I along the right lines about this?