Quilnux

Good Afternoon (morning/evening if you prefer), I have been looking for a beginners tutorial or guide on how to create and display UI elements on the screen when a player takes certain actions, whether it be an action of BIS_fnc_holdAddAction or something like a trigger, being able to display UI elements on the screen. For example, I would like to have the option of a dialog that has text in it with 3 button choices and each button having a script associated with it. The idea is that the user will be able to select one of the 3 buttons and get a set of equipment and weapons based on that selection. I have already tested the scripts I want to use and they work, I just need the dialog box. If someone can point me in the right direction I'd be very grateful. I cannot seem to find anything that talks about this. The Arma 3 wiki doesn't really help since there aren't any examples that I can follow with.