.loading-slider {
  position: fixed;
  overflow: hidden;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  z-index: 999;
}

.loading-slider.expanding {
  text-align: center;
}

.loading-slider.expanding span {
}

.loading-slider span {
  position: inherit;
  height: 2px;
  background-color: red;
}