Feedback on my first project? :)

I based by first project on Stephen Hawking, I’m pretty happy with it. I was trying to add some jQuery into it as I’ve literally just redone the learning for it however I can’t for the life of me get it to work in Codepen, any ideas?

I’ve selected the jQuery libraries for JS, and all I’ve entered is:

$(“h1”).addClass(“animated fadeOut”);

Just to test to see if it works, but no matter what I do, it does nothing. Any ideas?