I don't really get it and for me meowth08's method looks easier. Anyway - Thank for help!
It's not my method. I just tried to explain what you were thinking.
From the beginning of the thread, you were unable to explain to us the actual requirement.
From your first post, you mentioned you wanted to count 3600 seconds but the solution that you have given will not give you 3600 seconds.
It will only give you 3600 cycles for 10 seconds. If you get the period (time to complete a cycle), it would be (10 divided by 3600).
For the frequency (number of cycles in one second), it would be (3600 divided by 10).
You will not realize that your method of solving your problem is wrong unless you understand concept of period and frequency.
If you have time, please provide drawings of the circuit on your mind so we know how to help you.
Sir MikeMl has already given you the starting procedures.
Tell us which part you don't understand.