.flashingRed {
  animation-duration: 0.75s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  animation-play-state: running;
  animation-name: flsRed;
  transform: translateZ(0);
}

@keyframes flsRed {
  from {
    border: 5px solid #dc3545;
  }

  to {
    border: 5px solid #ffc107;
  }
}