Online indicator blink with animation shorthand

blinker.css

.is-online {
  height: 16px;
  width: 16px;
  display: inline-block;
  border-radius: 50%;
  background-color: $green;
  animation: blink 2s ease-in-out 0s 3;
  -webkit-animation: blink 2s ease-in-out 0s 3;
}

/* 
* blink - animation name 
* 2s - duration
* ease-in-out - timing function
* delay - 0s
* 3 - iteration count
*/

@keyframes blink {
  0% {
    background-color: $green;
  }
  20% {
    background-color: $green;
  }
  40% {
    background-color: transparent;
  }
  60% {
    background-color: transparent;
  }
  80% {
    background-color: $green;
  }
  100% {
    background-color: $green;
  }
}

@-webkit-keyframes blink {
  0% {
    background-color: $green;
  }
  20% {
    background-color: $green;
  }
  40% {
    background-color: transparent;
  }
  60% {
    background-color: transparent;
  }
  80% {
    background-color: $green;
  }
  100% {
    background-color: $green;
  }
}