Here's one implementation that is a bit more transparent on what's happening; plus it's sideways. http://codepen.io/bfred-it/details/BFDkI http://codepen.io/bfr

Here's one implementation that is a bit more transparent on what's happening; plus it's sideways. http://codepen.io/bfred-it/details/BFDkI http://codepen.io/bfred-it/details/BFDkI another one https://bitbucket.org/lucio.torre/scanimation/wiki/Home https://bitbucket.org/lucio.torre/scanimation/wiki/Home