.progress-bar.indeterminate {
    position: relative;
    animation: progress-indeterminate 4s linear infinite;
}

@keyframes progress-indeterminate {
    from {
        left: 0%;
        width: 0%;
    }

    to {
        left: 0%;
        width: 100%;
    }
}
.progress {
    position: relative;
    height: 3px
}