How do you make a gamepass that gives you fire?

Hi. I know it sounds weird, but I need a gamepass that gives the person a small trail of fire when they buy it.

I am a beginner, so I don't have a script because I don't understand much about it. But I do still watch the wiki videos.

So can you write a script that works when the gamepass is bought, and that it gives a small trail of fire to the person?

I am sorry that I don't have a script so someone can check but I really don't understand it that well. :(

Thanks!