My second attempt to ask how to make a flashlight

This seems to be a topic that's in constant contention with no concrete answer. I tried asking this at the beginning of this year (February) and got no great answer. So, how do you make a flashlight in MCreator? I have tried NorthWestTrees' tutorial, but it doesn't seem to work anymore. I want to be able to enable the flashlight by just detecting the variable. The item itself is a geckolib item. I hope that I can finally close the case on this thing