middlewayapproach

You can use the block inside the Gutenberg editor as you would use a any other block. You can find it in the common section.
Icon made by <a href="https://www.flaticon.com/de/autoren/freepik" rel="nofollow ugc">freepik</a> from www.flaticon.com

Particle Animation Block

Nice plugin

A Gutenberg block to render a particle effect.

Themosaurus

Add some cool stickers, sprinkle some particles on top, throw in a custom cursor, Pimp your Site and make it shiny! 
With our ready-made Christmas effects presets, in one click, your site is pimped ✨
This Christmas Edition is the free version of Pimp my Site. Want to Pimp your Site for every holiday and special occasions? <a href="https://codecanyon.net/item/pimp-my-site-holiday-weather-festive-effects-to-pimp-your-wordpress-site/40234707" rel="nofollow ugc">Get the full version now on CodeCanyon!</a>
<h4>Christmas Edition VS Full version</h4>
Christmas Edition
<ul>
<li>Access to 8 unique Christmas presets to decorate your site for Christmas. Presets include : 
— Christmas Stickers 
— Custom Christmas cursors 
— Particle effects (snow, falling stars, …) 
— Scrollbar color customization</li>
</ul>
Full version
<ul>
<li>Access to all presets for each special occasion : Halloween, Thanksgiving, Christmas, and more… New presets and themes added regularly!</li>
<li>Presets are fully customizable! Choose one, use it as is, or customize and mix & match everything to your liking : 
— Access to all stickers 
— Access to all custom cursors 
— Fully customizable particle effects (shape, color, speed, direction, size, density,…) 
— Choose your own scrollbar colors</li>
</ul>

Pimp my Site – Christmas Edition

Pimp your WordPress Site with Awesome Christmas Effects

Particle Animation Block vs Pimp my Site – Christmas Edition