.spin-container {
  display: none;
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
  z-index: 0;
}

.square{
  display: block;
  border:0;
  width:80px;
  padding:0px;
  margin-top: 90px;
  margin-left: calc(50% - 40px);
  margin-left: -webkit-calc(50% - 40px);
  margin-left: -moz-calc(50% - 40px);
}

.spin {
  height: 70px;
  width: 70px;
  border-radius: 50%;
  border:dashed 5px black;
  -webkit-animation-name: spin;
  -webkit-animation-duration: 1.5s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-timing-function: linear;
}

@-webkit-keyframes spin {
  from   {  -webkit-transform: rotate(0deg); }
  to   {  -webkit-transform: rotate(360deg); }
}