If you're new to animations in general, I recommend that you check out this video about CSS Animations first: https://www.youtube.com/watch?v=D9YQBaDBJ88
This is the Pen that we're working on in the video: http://codepen.io/jagtalon/pen/BjeLMj
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Web Animations API:
http://www.danielcwilson.com/blog/2015/07/animations-intro/
http://shoptalkshow.com/episodes/203-with-rachel-nabors-and-dan-wilson/
https://youtu.be/ep0_0W0qWsc
Other Animation Libraries:
https://greensock.com/
http://julian.com/research/velocity/
CSS VS JavaScript Animations:
https://developers.google.com/web/fundamentals/design-and-ui/animations/css-vs-javascript