Spinner adjustments, original by Gloria Langreo (http://dabblet.com/gist/6163594)

dabblet.css

/**
 * Spinner adjustments, original by Gloria Langreo (http://dabblet.com/gist/6163594)
 */

* { margin: 0; padding: 0; }
body { background-color: #434343; text-align:center; padding: 2em; }

.spinner { display: inline-block; margin-left: -2px; }
.spinner li {
	display: inline-block;
	width: 4px;
	height: 12px;
	margin-left: 2px;
	background-color: #fff;
	animation: 1s spin infinite alternate;
}
.spinner li:nth-child(2) { animation-delay: .125s; }
.spinner li:nth-child(3) { animation-delay:  .25s; }
.spinner li:nth-child(4) { animation-delay: .325s; }

@keyframes spin {
	25%, 75% { opacity: 0; }
}

dabblet.html

<ul class="spinner"><li><li><li><li></ul>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split-vertical","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}