The following code will display a CSS animated 'pulsing' circle.

In works in all browsers but not in Internet explorer.

How can I make it work in Internet Explorer?

Codepen: <http://codepen.io/danest/pen/GxfqB/>

```
#container {
  margin-top: 20px;
  margin-left: 30px;
  position: relative;
  background: #45453f;
}

.pulse {
  width: 10px;
  height: 10px;
  border: 5px solid #f7f14c;
  -webkit-border-radius: 30px;
  -moz-border-radius: 30px;
  border-radius: 30px;
  background-color: #716f42;
  z-index: 10;
  position: absolute;
}

.dot {
  border: 10px solid #fff601;
  background: transparent;
  -webkit-border-radius: 60px;
  -moz-border-radius: 60px;
  border-radius: 60px;
  height: 50px;
  width: 50px;
  -webkit-animation: pulse 3s ease-out;
  -moz-animation: pulse 3s ease-out;
  animation: pulse 3s ease-out;
  -webkit-animation-iteration-count: infinite;
  -moz-animation-iteration-count: infinite;
  animation-iteration-count: infinite;
  position: absolute;
  top: -25px;
  left: -25px;
  z-index: 1;
  opacity: 0;
}

@-moz-keyframes pulse {
 0% {
    -moz-transform: scale(0);
    opacity: 0.0;
 }
 25% {
    -moz-transform: scale(0);
   opacity: 0.1;
 }
 50% {
    -moz-transform: scale(0.1);
    opacity: 0.3;
 }
 75% {
    -moz-transform: scale(0.5);
    opacity: 0.5;
 }
 100% {
    -moz-transform: scale(1);
    opacity: 0.0;
 }
}

@-webkit-keyframes "pulse" {
 0% {
    -webkit-transform: scale(0);
    opacity: 0.0;
 }
 25% {
    -webkit-transform: scale(0);
    opacity: 0.1;
 }
 50% {
   -webkit-transform: scale(0.1);
    opacity: 0.3;
 }
 75% {
    -webkit-transform: scale(0.5);
    opacity: 0.5;
 }
 100% {
    -webkit-transform: scale(1);
    opacity: 0.0;
 }
}    

```