#progressBar {
    height: 3px;
    position: fixed;
    opacity: 0.5;
    z-index: 2;
    background: #27BED9;
    overflow: hidden;
    animation: progressBar 10s ease-in-out;
    animation-iteration-count: infinite;
    animation-fill-mode: both;
    bottom: 0;
    content: "";
    display: block;
    left: 0;
}

@keyframes progressBar {
    0% { left: 0; width: 0; }
    50% { left: 0; width: 100%; }
    100% { left: 100%; width: 0; }
}