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I practiced my object oriented programming skills on this task. It wasn't easy, but it was good for learning. Overall very good and useful challenge. And as usual, if someone wants to add something, feel free to post comments

This is not fully finished project. I might return to it later. Right now, if you change tabs my animations won't be in sync. This is probably a way browsers spare CPU from over-work. There is a way to fix this with JS, but I would have to change a lot of code and, for now, i'm gonna leave that for later. But if some of you have a desire to experiment with my code go ahead!

I am mostly just interested in Your opinions on the responsiveness of my site. Since I'm new to web-dev and am self-taught I'm not sure if I am doing it correctly.

BTW, thanks for such helpful resources.