@keyframes glowing {
    0% {  box-shadow:  0 0 15px 0px white; }
    10% {  box-shadow:  0 0 15px 2px white; }
    20% {  box-shadow:  0 0 15px 4px white; }
    30% {  box-shadow:  0 0 15px 6px white; }
    40% {  box-shadow:  0 0 15px 8px white; }
    50% {  box-shadow:  0 0 15px 10px white; }
    60% {  box-shadow:  0 0 15px 8px white; }
    70% {  box-shadow:  0 0 15px 6px white; }
    80% {  box-shadow:  0 0 15px 4px white; }
    90% {  box-shadow:  0 0 15px 2px white; }
    100% {  box-shadow:  0 0 15px 0px white; }

}

.blink_me {
    animation: blinker 1s linear infinite;
  }
  
  @keyframes blinker {
    50% {
      opacity: 0;
    }
  }