.spinner {
  width: 100%;
  height: 100%;
  background-color: #2196f3;
  z-index: 1000;
  position: fixed;
}

.double-bounce1, .double-bounce2 {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: #fff;
  opacity: 0.7;
  position: fixed;
  margin: 0 auto;
  top: 46%;
  right: 46%;

  -webkit-animation: sk-bounce 2.0s infinite ease-in-out;
  animation: sk-bounce 2.0s infinite ease-in-out;
}

.double-bounce2 {
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

@-webkit-keyframes sk-bounce {
  0%, 100% { -webkit-transform: scale(0.0) }
  50% { -webkit-transform: scale(1.0) }
}

@keyframes sk-bounce {
  0%, 100% {
    transform: scale(0.0);
    -webkit-transform: scale(0.0);
  } 50% {
    transform: scale(1.0);
    -webkit-transform: scale(1.0);
  }
}