.pulse-loader:not(:required) {
  display: inline-block;
  width: 50px;
  height: 50px;
  -moz-animation: pulse-loader 0.7s linear infinite alternate;
  -webkit-animation: pulse-loader 0.7s linear infinite alternate;
  animation: pulse-loader 0.7s linear infinite alternate;
  border: 2px solid #e67e22;
  -moz-border-radius: 50%;
  -webkit-border-radius: 50%;
  border-radius: 50%;
  overflow: hidden;
  text-indent: 50px;
}

@-moz-keyframes pulse-loader {
  0% {
    -moz-box-shadow: #e67e22 0 0 0px 20px;
    box-shadow: #e67e22 0 0 0px 20px;
  }
  40% {
    -moz-box-shadow: none;
    box-shadow: none;
  }
  100% {
    -moz-box-shadow: #e67e22 0 0 0px 25px inset;
    box-shadow: #e67e22 0 0 0px 25px inset;
  }
}
@-webkit-keyframes pulse-loader {
  0% {
    -webkit-box-shadow: #e67e22 0 0 0px 20px;
    box-shadow: #e67e22 0 0 0px 20px;
  }
  40% {
    -webkit-box-shadow: none;
    box-shadow: none;
  }
  100% {
    -webkit-box-shadow: #e67e22 0 0 0px 25px inset;
    box-shadow: #e67e22 0 0 0px 25px inset;
  }
}
@keyframes pulse-loader {
  0% {
    -moz-box-shadow: #e67e22 0 0 0px 20px;
    -webkit-box-shadow: #e67e22 0 0 0px 20px;
    box-shadow: #e67e22 0 0 0px 20px;
  }
  40% {
    -moz-box-shadow: none;
    -webkit-box-shadow: none;
    box-shadow: none;
  }
  100% {
    -moz-box-shadow: #e67e22 0 0 0px 25px inset;
    -webkit-box-shadow: #e67e22 0 0 0px 25px inset;
    box-shadow: #e67e22 0 0 0px 25px inset;
  }
}