Noise effect java script

Design help General
1

Does anyone know how I make this effect on the background noise on my site by webflow?
see in this example:

https://www.unitedcollective.com/

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

2

Try to use this library in your custom code section: Generate animated noise texture with grained.js

4

Thanks a lot!!!:grinning:

5

I’m not very good at websites … could you tell me how I put this in webflow?
What part of the code stays in the head and how do I do it?
Please.