かっこいいのを見つけたのでメモ。
マークアップは下記の通り。

■HTML

<div class="stage">
<div class='loader'>
  <div class='circle'></div>
  <div class='circle'></div>
  <div class='circle'></div>
  <div class='circle'></div>
  <div class='circle'></div>
</div>
</div>

■CSS

.stage {
  background: #111;
  width: 300px;
  height: 250px;
  margin: 0 auto;
}
.loader {
  position: relative;
  padding-top: 100px;
  width: 40px;
  margin: auto;
}
.loader .circle {
  position: absolute;
  width: 38px;
  height: 38px;
  opacity: 0;
  -webkit-transform: rotate(225deg);
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-name: orbit;
  -webkit-animation-duration: 5.5s;
}
.loader .circle:after {
  content: '';
  position: absolute;
  width: 5px;
  height: 5px;
  border-radius: 5px;
  background: #fff;
  /* Pick a color */
}
.loader .circle:nth-child(2) {
  -webkit-animation-delay: 240ms;
}
.loader .circle:nth-child(3) {
  -webkit-animation-delay: 480ms;
}
.loader .circle:nth-child(4) {
  -webkit-animation-delay: 720ms;
}
.loader .circle:nth-child(5) {
  -webkit-animation-delay: 960ms;
}
@-webkit-keyframes orbit {
  0% {
    -webkit-transform: rotate(225deg);
    opacity: 1;
    -webkit-animation-timing-function: ease-out;
  }
  7% {
    -webkit-transform: rotate(345deg);
    -webkit-animation-timing-function: linear;
  }
  30% {
    -webkit-transform: rotate(455deg);
    -webkit-animation-timing-function: ease-in-out;
  }
  39% {
    -webkit-transform: rotate(690deg);
    -webkit-animation-timing-function: linear;
  }
  70% {
    -webkit-transform: rotate(815deg);
    opacity: 1;
    -webkit-animation-timing-function: ease-out;
  }
  75% {
    -webkit-transform: rotate(945deg);
    -webkit-animation-timing-function: ease-out;
  }
  76% {
    -webkit-transform: rotate(945deg);
    opacity: 0;
  }
  100% {
    -webkit-transform: rotate(945deg);
    opacity: 0;
  }
}

■デモ