@keyframes swing {
    0% {
        transform: rotate(0deg);
    }
    10% {
        transform: rotate(10deg);
    }
    30% {
        transform: rotate(0deg);
    }
    40% {
        transform: rotate(-10deg);
    }
    50% {
        transform: rotate(0deg);
    }
    60% {
        transform: rotate(5deg);
    }
    70% {
        transform: rotate(0deg);
    }
    80% {
        transform: rotate(-5deg);
    }
    100% {
        transform: rotate(0deg);
    }
}

@keyframes sonar {
    0% {
        transform: scale(0.9);
        opacity: 1;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}