loop thru start and stop time, return total time

Question

I have created a method with an if statement to check for timein of 8 and timeout of 4. I have set the if statements to 8 and 4 regardless of what the actualy timein or timeout is. I am returning the total hours between 8 and 4. I am trying to create a loop to test my method, but I'm not sure how to set it up where I can write the timein, then read, write the timeout, read, then display. Can you help?