MENU Program for Simple LCD

Hi,

I'm new to arduino, Apologiz if this has been asked too many time here but didn't any that meet my requirement

I want to develop a menu driven program for a machine that will have the following Menu:

A. Device-1 1. Normal 2. Fast 3. Set Time

B. Device-2 1. Normal 2. Set Time

In Set time I want to be able to set the time for the Normal or Fast. also I'm using 5 buttons 1. Menu 2. Back 3. Inc Value 4. Dec Value 5. OK

I found a really good program at

https://www.hackster.io/ianabcumming/a-simple-arduino-menu-with-an-lcd-254080

With the help of this I was able to develop the menu as need but I'm unable to add any new functions like Set Time Delay.

please can any one help me.