.loading > .fe-loader {
    display: block;
}
.fe-loader {
    position: fixed;
    display:none;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    background-color: rgba(230,230,230,.4);
}

.fe-sig {
    border: 5px solid #333;
    border-radius: 30px;
    height: 30px;
    left: 50%;
    margin: -15px 0 0 -15px;
    opacity: 0;
    position: absolute;
    top: 50%;
    width: 30px;
    animation: pulsate 1s ease-out;
    animation-iteration-count: infinite;
}

@keyframes pulsate {
    0% {
        transform: scale(.1);
        opacity: 0.0;
    }

    50% {
        opacity: 1;
    }

    100% {
        transform: scale(1.2);
        opacity: 0;
    }
}