$size: 30px;

.beacon {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: orange;
    opacity: 1;
    height: $size;
    width: $size;
    border-radius: 50%;
    -webkit-transform: translateX(-50%) translateY(-50%);
    box-shadow: 5px 5px 5px 0px rgba(0, 0, 0, 0.75);
    animation: beaconActive 2s infinite ease;
}

@keyframes beaconActive {
    0% {
        transform: scale(0.5);
        opacity: 1;
    }
    70% {
        transform: scale(1);
        opacity: 0.7;
    }
    100% {
        transform: scale(0.5);
        opacity: 1;
    }
}