A Pen by David DeSandro.

index.html

<div class="loader">
  <div class="dot dot1"></div>
  <div class="dot dot2"></div>
  <div class="dot dot3"></div>
  <div class="dot dot4"></div>
</div>

Loader-dots.markdown

Loader dots

Lamer version of http://codepen.io/jshawl/pen/IFxBK

A Pen by David DeSandro on CodePen.

License.

style.css

/* change font size to change size */

.loader {
  font-size: 20px;
  position: relative;
  width: 4em;
  height: 1em;
  margin: 100px auto;
}

.dot {
  width: 1em;
  height: 1em;
  border-radius: 0.5em;
  background: #333;
  position: absolute;
  animation-duration: 0.5s;
  animation-timing-function: ease;
  animation-iteration-count: infinite;
}

.dot1, .dot2 {
  left: 0;
}

.dot3 { left: 1.5em; }

.dot4 { left: 3em; }

@keyframes reveal {
  from { transform: scale(0.001); }
  to { transform: scale(1); }
}

@keyframes slide {
  to { transform: translateX(1.5em) }
}


.dot1 {
  animation-name: reveal;
}

.dot2, .dot3 {
  animation-name: slide;
}

.dot4 {
  animation-name: reveal;
  animation-direction: reverse; /* thx @HugoGiraudel */
}