.spanner{
  position:absolute;
  top: 50%;
  left: 0;
  background: #2a2a2a55;
  width: 100%;
  display:block;
  text-align:center;
  height: 300px;
  color: #FFF;
  transform: translateY(-50%);
  z-index: 1000000000;
  visibility: hidden;
}

.overlay{
  position: fixed;
	width: 100%;
	height: 100%;
  background: rgba(0,0,0,0.5);
  visibility: hidden;
  z-index: 1000000000;
}

.show{
  visibility: visible;
}

.spanner, .overlay{
	opacity: 0;
	-webkit-transition: all 0.3s;
	-moz-transition: all 0.3s;
	transition: all 0.3s;
}

.spanner.show, .overlay.show {
	opacity: 1
}
.lds-grid {
    display: inline-block;
    position: relative;
    width: 80px;
    height: 80px;
    margin-top: 60px;
  }
  .lds-grid div {
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    animation: lds-grid 1.2s linear infinite;
  }
  .lds-grid div:nth-child(1) {
    top: 8px;
    left: 8px;
    animation-delay: 0s;
  }
  .lds-grid div:nth-child(2) {
    top: 8px;
    left: 32px;
    animation-delay: -0.4s;
  }
  .lds-grid div:nth-child(3) {
    top: 8px;
    left: 56px;
    animation-delay: -0.8s;
  }
  .lds-grid div:nth-child(4) {
    top: 32px;
    left: 8px;
    animation-delay: -0.4s;
  }
  .lds-grid div:nth-child(5) {
    top: 32px;
    left: 32px;
    animation-delay: -0.8s;
  }
  .lds-grid div:nth-child(6) {
    top: 32px;
    left: 56px;
    animation-delay: -1.2s;
  }
  .lds-grid div:nth-child(7) {
    top: 56px;
    left: 8px;
    animation-delay: -0.8s;
  }
  .lds-grid div:nth-child(8) {
    top: 56px;
    left: 32px;
    animation-delay: -1.2s;
  }
  .lds-grid div:nth-child(9) {
    top: 56px;
    left: 56px;
    animation-delay: -1.6s;
  }
  .lds-grid:before,
  .lds-grid:after {
    content: '';
    position: absolute;
    top: 0;
  }
  @keyframes lds-grid {
    0%, 100% {
      opacity: 1;
    }
    50% {
      opacity: 0.5;
    }
  }