<div id="animation">
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging01.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging02.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging03.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging04.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging05.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging06.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging07.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging08.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging09.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging10.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging11.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging12.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging13.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging14.png" />
<img src="http://jumpingfishes.com/dancingpurpleunicorns/charging15.png" />
</div>
onload = function startAnimation() {
var frames = document.getElementById("animation").children;
var frameCount = frames.length;
var i = 0;
setInterval(function () {
frames[i % frameCount].style.display = "none";
frames[++i % frameCount].style.display = "block";
}, 30);
}