@keyframes flash {
    0% {
        opacity: 1;
     }

    50% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

.validatorError {
    color: red !important;
    font-weight: bold !important;
    font-size: 18px !important;
    vertical-align: middle !important;
    animation: flash 2s infinite;
}