.glow {
  text-shadow: 0 0 0.4rem #ffa500, 0 0 1rem #ffa500, 0 0 1.2rem #ffa500, 0 0 3rem #ffa500, 0 0 4rem #ff0000, 0 0 0.8rem #ff8d00, 0 0 7rem #ff0000;
  color: #fff6a9;
  animation: blink 12s infinite;
  -webkit-animation: blink 12s infinite;
}

@-webkit-keyframes blink {

  20%,
  24%,
  55% {
    color: #111;
    text-shadow: none;
  }

  0%,
  19%,
  21%,
  23%,
  25%,
  54%,
  56%,
  100% {
    text-shadow: 0 0 0.4rem #ffa500, 0 0 1rem #ffa500, 0 0 1.2rem #ffa500, 0 0 3rem #ffa500, 0 0 4rem #ff0000, 0 0 0.8rem #ff8d00, 0 0 7rem #ff0000;
    color: #fff6a9;
  }
}

@keyframes blink {

  20%,
  24%,
  55% {
    color: #111;
    text-shadow: none;
  }

  0%,
  19%,
  21%,
  23%,
  25%,
  54%,
  56%,
  100% {
    text-shadow: 0 0 0.4rem #ffa500, 0 0 1rem #ffa500, 0 0 1.2rem #ffa500, 0 0 3rem #ffa500, 0 0 4rem #ff0000, 0 0 0.8rem #ff8d00, 0 0 7rem #ff0000;
    color: #fff6a9;
  }
}