How to make such an animation (example in the application)?

Question

css

Good day!
Friends how to make flying white dots on the first screen? Or how it was made I can’t understand

Website https://l11l.ru/225

Answer 1

The white dots are made with a picture: https://static.tildacdn.com/img/snowflakes_1.png
And, the animation is made in CSS:
animation: t557__snow 20s linear infinite;