another css loading animation. kinda like the last. Different colours for kicks. Choosing no colour (not possible unless you edit the HTML or js) will result in a black dot.

index.html

<h1>CSS Loading</h1>
<ul class="drops blue">
  <li></li>
  <li></li>
  <li></li>
  <li></li>
  <li></li>
</ul>

<ul class="nav">
<li data-assign="pink">Toggle Pink</li>

<li data-assign="blue">Toggle Blue</li>

<li data-assign="green">Toggle Green</li>

<li data-assign="red">Toggle Red</li>

<li data-assign="yellow">Toggle Yellow</li>
</ul>

script.js

$('li').on('click', function() {
  var drops = $('.drops'),
      oldClass = drops.prop('class').split(' ')[1],
      newClass = $(this).data('assign');
  drops.toggleClass(oldClass + ' ' + newClass);
});

style.css

@import url(http://fonts.googleapis.com/css?family=Advent+Pro:700);
/* Meat and potatoes */
.drops {
  list-style: none;
  position: relative;
  height: 10px;
  width: 140px;
  margin: 0 auto; /* center the animation */
  margin-top: 40px; /* padd the top from the text */
}
.drops li {
  position: absolute;
  top: 0px;
  height: 10px;
  width: 10px;
  background-color: black;
  border-radius: 5px;
  animation-name: loading;
  animation-duration: 5s;
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
  animation-direction: normal;
}
.drops li:nth-child(1) {
  left: 0px;
  animation-delay: 250ms;
}
.drops li:nth-child(2) {
  left: 40px;
  animation-delay: 500ms;
}
.drops li:nth-child(3) {
  left: 80px;
  animation-delay: 750ms;
}
.drops li:nth-child(4) {
  left: 120px;
  animation-delay: 1s;
}
.drops li:nth-child(5) {
  left: 160px;
  animation-delay: 1.25s;
}
@keyframes loading {
  0% { margin-left: -3000px; }
  30%,70% { margin-left: 0px; }
  100% { margin-left: 3000px; }
}
/* Colours */
.drops.pink li {
  background-color: #ff55de;
  box-shadow:  0 0 5px #ff99de, 0 0 10px #ff99de, 0 0 15px #ff99de, 0 0 20px #ff00de, 0 0 30px #ff00de, 0 0 40px #ff00de;
}
.drops.blue li {
  background-color: #99deff;
  box-shadow:  0 0 5px #99afff, 0 0 10px #99afff, 0 0 15px #99afff, 0 0 20px #99afff, 0 0 30px #99afff, 0 0 40px #99afff;
}
.drops.green li {
  background-color: #99ffde;
  box-shadow:  0 0 5px #99ffaf, 0 0 10px #99ffaf, 0 0 15px #99ffaf, 0 0 20px #99ffaf, 0 0 30px #99ffaf, 0 0 40px #99ffaf;
}
.drops.red li {
  background-color: #ff4444;
  box-shadow:  0 0 5px #ff2222, 0 0 10px #ff2222, 0 0 15px #ff2222, 0 0 20px #ff2222, 0 0 30px #ff2222, 0 0 40px #ff2222;
}
.drops.yellow li {
  background-color: #ffff44;
  box-shadow:  0 0 5px #ffff22, 0 0 10px #ffff22, 0 0 15px #ffff22, 0 0 20px #ffff22, 0 0 30px #ffff22, 0 0 40px #ffff22;
}
/* Presentation */
body {
  background: #474747 url(http://line25.com/wp-content/uploads/2009/letterpress/demo/bg.png);
  padding-top: 5em;
  overflow: hidden;
}
h1, .nav li {
  font-family: "Advent Pro";
  text-align: center;
  color: #222;
  letter-spacing: 0.15em;
  font-weight: 700;
  text-transform: uppercase;
  color: #222; text-shadow: 0px 2px 3px #555;
}
.nav {
  position: fixed;
  top: 10px;
  left: 10px;
  list-style: none; 
}
.nav li {
  display: inline-block;
  background-color: #999999;
  border: 1px solid #222;
  border-radius: 3px;
  padding: 6px 12px;
  cursor: pointer;
}
.nav li:hover {
  background-color: white;
}
h1 {
  font-size: 2.6em;
}
button {
  padding: 6px 8px; 
}