#mySpinner {
    width: 100%;
    height: 100%;
    position: fixed;
    z-index: 2000;
    background: rgba(0,0,0,0.5);
    left: 0;
    top: 0;
}

@keyframes spinner {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.spinner:before {
    content: '';
    box-sizing: border-box;
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin-top: -15px;
    margin-left: -15px;
    border-radius: 50%;
    border: 1px solid #ccc;
    border-top-color: #103178;
    animation: spinner .6s linear infinite;
}