.btn-ring {
    display: none;
    top : 5px;
    position: absolute;
    right: 50px;
}

    .btn-ring:after {
        content: "";
        display: block;
        width: 25px;
        height: 25px;
        margin: 8px;
        border-radius: 50%;
        border: 3px solid #fff;
        border-color: #fff transparent #fff transparent;
        animation: ring 1.2s linear infinite;
    }

@keyframes ring {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}