.sk-wave {
  margin: 40px auto;
  width: 50px;
  height: 40px;
  text-align: center;
  font-size: 10px; }
.sk-wave .sk-rect {
  background-color: #333;
  height: 100%;
  width: 6px;
  display: inline-block;
  -webkit-animation: sk-waveStretchDelay 1.2s infinite ease-in-out;
  animation: sk-waveStretchDelay 1.2s infinite ease-in-out; }
.sk-wave .sk-rect1 {
  -webkit-animation-delay: -1.2s;
  animation-delay: -1.2s; }
.sk-wave .sk-rect2 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s; }
.sk-wave .sk-rect3 {
  -webkit-animation-delay: -1s;
  animation-delay: -1s; }
.sk-wave .sk-rect4 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s; }
.sk-wave .sk-rect5 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s; }
@-webkit-keyframes sk-waveStretchDelay {
  0%, 40%, 100% {
    -webkit-transform: scaleY(0.4);
    transform: scaleY(0.4); }
  20% {
    -webkit-transform: scaleY(1);
    transform: scaleY(1); } }
@keyframes sk-waveStretchDelay {
  0%, 40%, 100% {
    -webkit-transform: scaleY(0.4);
    transform: scaleY(0.4); }
  20% {
    -webkit-transform: scaleY(1);
    transform: scaleY(1); }
}