Average using nbit numbers add them together and divide by n bit number

I've managed to clean up the code big time. I understand I was super vague. I guess my main problems are with modules inputs and outputs. When I'm using a module can I loop my input as my output. Also can I set reg's equal to each other if so where can I do that. I'm have a lot of trouble because it did not like my assignments so i tried to make everything modules and tried to only chang in enables and clears but I'm still having issues