.development-environment-message {
  animation: bns-custom-admin-bar-animation 1s infinite alternate;
}

@keyframes bns-custom-admin-bar-animation {
  0% {
    background-color: #00ff00;
    border: 3px solid #e50000;
  }
  100% {
    background-color: #e50000;
    border: 3px solid #00ff00;
  }
}