body.loading::after {
  content: " ";

  display: block;

  z-index: 999999999;
  position: fixed;
  left: 0;
  top: 0;
  opacity: 1;
  background-color: rgba(0, 26, 112, 0.2);
  width: 100vw;
  height: 100vh;

  background-image: url(loading_green_2.gif);
  background-size: 50px 50px;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center;
}