Menu with lcd 20X 4

Hi everyone, although for some years I use arduino for my small projects, I can not figure out how to create a menu with lcd display for my aquarium controller project. You can help me?

I'm sorry to hear that.

Were you expecting us to help? You need to explain a lot more about what you're trying to do, what you have done, and how it doesn't work for us to be able to do that.

This is something that has been done thousands of times; google will find you many examples and discussions of the subject. you should do this background research and see if you're still stuck afterwards.

you are right, I must be clearer but I'm not very good at writing in English. I am Italian and therefore of the same arduino country .....
I see how to explain it better: I can not understand how to create menus, navigable on lcd, just can not understand how logic to write a program. I've been searching on google and many are posting their software, I would like to understand just how to create the program. I apologize for the disorder!