Snow.js spawns snow over your website. Updates will follow. Development started on 2019/11/05.
To implement it onto a website, just go to the end of your HTML and paste this:<script src="https://maingron.com/projects/snowjs/latest/snow.js" async></script>
If you want to see some examples, you can see them here. Click on a website name to view it inside the frame below: