#spinner {
    border: 12px solid #f3f3f3; /* Light grey */
    border-top: 12px solid red;
    border-radius: 50%;
    width: 70px;
    height: 70px;
    animation: spin 1s linear infinite;
}

.center {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    z-index: 99;
}

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

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