.center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
 }

 .loader-image {
    background:url('/icons/Icon-192.png');
    height:192px;
    width:192px;
 }

 .pulse {
    animation: pulse 1.5s infinite;
    margin: 0 auto;
    display: table;
    margin-top: 50px;
    animation-direction: alternate;
    -webkit-animation-name: pulse;
    animation-name: pulse;
    transition: opacity 0.4s ease-out;
}

@-webkit-keyframes pulse {
    0% {
        -webkit-transform: scale(1);
    }
    50% {
        -webkit-transform: scale(1.1);
    }
    100% {
        -webkit-transform: scale(1);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}