.loader {
  width: 100%;
  height: 2px;
  background-color: #03A9F4;
}

.loading {
  position: fixed;
  top: 0;
  z-index: 9999;

  background-color: #03A9F4;
  width: 100%;
  animation: loading 4s ease-in-out infinite;
}

@keyframes loading {
  from {margin-left: -100%; z-index:100;}
  to {margin-left: 100%; }
}