public/sass/components/loading-bars.scss

@import "palette";

.loading-bars {
  margin: 100px auto;
  width: 50px;
  height: 30px;
  text-align: center;
  font-size: 10px;
}

.loading-bars > div {
  background-color: $color-500-grey;
  height: 100%;
  width: 6px;
  display: inline-block;

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

.loading-bars .rect2 {
  animation-delay: -1.1s;
}

.loading-bars .rect3 {
  animation-delay: -1.0s;
}

.loading-bars .rect4 {
  animation-delay: -0.9s;
}

.loading-bars .rect5 {
  animation-delay: -0.8s;
}

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