Thank you for your help.
This is the code I’ve tried to use:
<script type="text/javascript" src="https://cdn.statically.io/gist/Davidson-wq/b5058cf637c180537f3153219e2fee0b/raw/89858bf40bcfde6e4ab198509705c2bab10aedbe/Particles.js">
and still nothing.
I have followed this tutorial by @samliew How to host text files on Github and got nothing (yes, I also went through the entire comment section as well).
Meanwhile, I am trying to get better at coding with w3schools.com but haven’t figured out what exactly am I doing wrong.