NPC shop menu
Hello, I'm trying to make an NPC shop using citizens and dtl traders plugins, with quite similar GUI menu as the one on hypixel skyblock bazaar (just a simple shop, but with submenu like that), something like when I interact with farmer npc it opens a menu and in it i click on an item (e.g. wheat) it opens similar items (e.g. seeds, wheat, hay bale). I'm new to this and don't really know how to make the submenu like that.
