@keyframes shinyshiny {
    0% {
        left: -100%;
        opacity: 0;
    }
    25% {
        left: -75%;
        opacity: 0.8;
    }
    50% {
        left: -50%;
        opacity: 1;
    }
    100% {
        left: 0%;
        opacity: 0;
    }
}