About implementing javascript to bootstrap

Daer members, I was trying to implement some code from https://codepen.io/technovore/pen/aOdGjY and nothing happens. I just cannot make it work. I create a js file, import css code and html code, but it simply doesn't work. Could someone please help and give me a guide of how to get this particles working.

Thnak you.

Make sure you link the required https://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js before the js script.