.development-environment-message {
  -webkit-animation: bns-custom-admin-bar-animation 1s infinite; /* Safari 4+ */
  -moz-animation: bns-custom-admin-bar-animation 1s infinite; /* Fx 5+ */
  -o-animation: bns-custom-admin-bar-animation 1s infinite; /* Opera 12+ */
  animation: bns-custom-admin-bar-animation 1s infinite; /* IE 10+, Fx 29+ */
}

@-webkit-keyframes bns-custom-admin-bar-animation {
  0%,
  49% {
    background-color: #00ff00;
    border: 3px solid #e50000;
  }
  50%,
  100% {
    background-color: #e50000;
    border: 3px solid #00ff00;
  }
}