.loader {
  clear: both;
  width: 2rem;
  height: 2rem;
  margin: 1rem auto;
  border: 0.0625rem #000 solid;
  border-radius: 0.25rem;
  position: relative;
  background: linear-gradient(45deg, transparent 49%, #000 50%, #000 50%, transparent 51%, transparent),
				linear-gradient(-45deg, transparent 49%, #000 50%, #000 50%, transparent 51%, transparent);
  background-size: 1rem 1rem;
  background-position: 0% 0%;
  -webkit-animation: spTexture 1s infinite linear;
  animation: spTexture 1s infinite linear;
}

@keyframes spTexture {
  from {
    background-position: 0 0;
  }

  to {
    background-position: -1rem 0;
  }
}