Don’t follow that advice. It commits several anti-patterns. The extended answer is largely distracted by common questions unrelated to your problem, and gives misleading answers to the questions it invents.
@MaxHearnden’s response is correct, even if it doesn’t give you a snippet. If you need more handholding, look for similar questions around here, this is asked weekly. Or at least say so if you don’t understand so we can elaborate.
Christ LLMs are horrifyingly good at starting cargo cults, but I guess what do you expect if nobody thinks about what they do anymore.