Wix Velo Coder

I am designing a website and need help creating sub-submenus through the Wix platform. Sub-sub menus are a tool that Wix currently does not offer however the Wix platform allows people to code unavailable tools through Velo, their coding software.

I need no other help than to add this one feature. Ideally, I would love to change my current menu to the one a menu capable of sub-sub menus like the one displayed on Wix's homepage.