How can I implement JS into a page?

Good day everyone.
I’d like to implement a third-party JavaScript into one of my pages, but I’m not familiar with how I can do this. Could someone walk me through the process of how I can use JavaScript that I find online and implement it into one of my Webflow pages?

What I’m looking to implement is the following:

Any help is appreciated,
Thanks in advance.

Please search the forum and try something first Search results for 'ParticlesJS' - Forum | Webflow