Preloader

http://tobiasahlin.com/spinkit/

      <div class="wada-preloader">
        <div class="spinner">
          <div class="rect1"></div>
          <div class="rect2"></div>
          <div class="rect3"></div>
          <div class="rect4"></div>
          <div class="rect5"></div>
        </div>
      </div>

.spinner > div {
  background-color: #333;
  height: 100%;
  width: 6px;
  display: inline-block;

  -webkit-animation: sk-stretchdelay 1.2s infinite ease-in-out;
  animation: sk-stretchdelay 1.2s infinite ease-in-out;
}

.spinner .rect2 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}

.spinner .rect3 {
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

.spinner .rect4 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

.spinner .rect5 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}

@-webkit-keyframes sk-stretchdelay {
  0%, 40%, 100% { -webkit-transform: scaleY(0.4) }
  20% { -webkit-transform: scaleY(1.0) }
}

@keyframes sk-stretchdelay {
  0%, 40%, 100% {
    transform: scaleY(0.4);
    -webkit-transform: scaleY(0.4);
  }  20% {
    transform: scaleY(1.0);
    -webkit-transform: scaleY(1.0);
  }
}
.wada-preloader .spinner {
    margin: 0;
    width: 50px;
    height: 40px;
    text-align: center;
    font-size: 10px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.wada-preloader {
    position: fixed;
    z-index: 1050;
    overflow-y: hidden;
    left: 0;
    top: 0;
    background-color: #1C7ADC;
    width: 100%;
    height: 100%;
}

.wada-preloader .spinner .rect1 {
    background-color: red;
}