@-webkit-keyframes borderScale {
  0% {
    border: 5px solid white;
  }
  50% {
    border: 25px solid #3498db;
  }
  100% {
    border: 5px solid white;
  }
}

@keyframes borderScale {
  0% {
    border: 5px solid white;
  }
  50% {
    border: 25px solid #3498db;
  }
  100% {
    border: 5px solid white;
  }
}
.loading_txt{
font-weight: bold;
  font-size: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-right: -50%;
  transform: translate(-50%, -50%);
}
.loading_box {
  width: 100px;
  height: 100px;
  color: white;
  margin: 0 auto;
  position: fixed;
  top: 50%;
  left: 50%;
  margin-right: -50%;
  transform: translate(-50%, -50%);
  border: 5px solid #3498db;
  border-radius: 50%;
  -webkit-animation: borderScale 1s infinite ease-in-out;
  animation: borderScale 1s infinite ease-in-out;
}