A Pen created at CodePen.io. You can find this one at https://codepen.io/Zaku/pen/LyvZjY.

 Play around with the timings on the gui to get different animations

All three versions so far:
1: https://codepen.io/Zaku/pen/vcaFr
2: https://codepen.io/Zaku/pen/JNzYXP
3: https://codepen.io/Zaku/pen/LyvZjY

See shot on dribbble: https://dribbble.com/shots/3539398--version-3