403 Error CSS animation

Hey Dribbble, long time no see!
Today I was going trough my old files and found this pure CSS animation that I did 2 years ago (link: https://codepen.io/ageevaagata/pen/PGbvpZ?editors=1100)
The thing is that when you get this error it means that you don't have an authorization for this page.

Cheers!