body,body.pace-done{
    background-color: #ffffff !important;
}
.video_caption1{
    color: white;
    font-size: 3em;
    animation: colorPulse 2s ease-in-out infinite alternate;
    text-align: center;
}

@keyframes colorPulse {
    0% {
        color: white;
    }
    100% {
        color: #d3d3d3; /* light grey */
    }
}