.nias-mask img {
    -webkit-mask: linear-gradient(-60deg,#000 30%,#0005,#000 50%) right / 300% 100%;
    mask: linear-gradient(-60deg,#000 30%,#0005,#000 50%) right / 300% 100%;
    animation: nsshine 3s infinite
}

@keyframes nsshine {
    0% {
        -webkit-mask-position: 140% 140%;
        mask-position: 140% 140%
    }

    100% {
        -webkit-mask-position: -20% -20%;
        mask-position: -20% -20%
    }
}
