#loading {
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  position: fixed;
  display: block;
  opacity: 0.9;
  background-color: #fff;
  z-index: 9999999;
  text-align: center;
}

#loading-image {
  position: absolute;
  width: 200px;
  height: 200px;
  top: calc(50% - 100px);
  left: calc(50% - 100px);
  z-index: 100;
}