@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(116, 116, 116, 0.7);
    }
    70% {
        box-shadow: 0 0 20px 20px rgba(212, 212, 212, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(212, 212, 212, 0);
    }
}