https://youtube.com/user/jacksepticeye has recently reached four millon subscribers. (go check him out if you haven't already)
To honor that with a little something, I made this userstyle, I hope you will enjoy it.
This theme will activate when you visit any youtube URL that has "jacksepticeye", or the channel id in it, and on the milestone video as well.

(If J, you read this, go and continue what you're doing and never stop! Although I find it hard to imagine you in your sixties doing Youtube like now, but who knows? Here's to enjoy many more years with you and your videos!)