A CodePen by Tim Pietrusky. 1/2 clock animation - My answer for a [question at SO](http://stackoverflow.com/questions/14374092/making-div-animate-and-appear-rotating-clockwise-i-e-radialwipe-clock-effect-for). It's as good as I can do it :(

Please note: I need to add the wrapper-element because of this bug:

[overflow:hidden + border-radius does not work when transform is added to child](https://bugs.webkit.org/show_bug.cgi?id=98538)