Live code demo: http://codepen.io/squarecat/pen/KuHsl http://codepen.io/squarecat/pen/KuHsl Edit: The article has a demo, but live code is sexy. Edit2: Now wi

Live code demo: http://codepen.io/squarecat/pen/KuHsl http://codepen.io/squarecat/pen/KuHsl Edit: The article has a demo, but live code is sexy. Edit2: Now with music, courtesy http://news.ycombinator.com/item?id=4693403 http://news.ycombinator.com/item?id=4693403 (rudimentary play/pause control at top left via partially-exposed video)