.progress {
    position: relative;
    height: 4px;
    display: block;
    width: 100%;
    background-color: #111;
    margin: 0.5rem 0 1rem 0;
    overflow: hidden;
}

.progress .indeterminate {
    background-color: #00C4FF;
}

.progress .indeterminate:before {
    content: '';
    position: absolute;
    background-color: inherit;
    top: 0;
    left: 0;
    bottom: 0;
    will-change: left, right;
    animation: indeterminate 2.1s cubic-bezier(0.65, 0.815, 0.735, 0.395) infinite;
}


.progress .indeterminate:after {
    content: '';
    position: absolute;
    background-color: inherit;
    top: 0;
    left: 0;
    bottom: 0;
    will-change: left, right;
    animation: indeterminate-short 2.1s cubic-bezier(0.165, 0.84, 0.44, 1) infinite;
    animation-delay: 1.15s;
}

@keyframes indeterminate {
  0% {
    left: -35%;
    right: 100%; }

  60% {
    left: 100%;
    right: -90%; }

  100% {
    left: 100%;
    right: -90%; } }

@keyframes indeterminate-short {
  0% {
    left: -200%;
    right: 100%; }

  60% {
    left: 107%;
    right: -8%; }

  100% {
    left: 107%;
    right: -8%; } }