Adding Embed html and css files

Hi!

I’m trying to add a cool dot grid animation to my site from codepen, but have never been able to make it work.

My site:
https://wings-ultra-awesome-project.webflow.io/

Codepen:

Here is what I had done so far.
Separate html and css into separate files and add them in my repositories on Github. Grab the raw links and generate new links for hosting from https://combinatronics.com/

The outcome:
https://combinatronics.com/wingwat/dot-grid/master/dot-grid.css
https://combinatronics.com/wingwat/dot-grid/master/dot-grid.html

Follow the instructions from another post I read:

Can someone please help and let me know which step I did wrong?

I appreciate any inputs on this!