/* HTML: <div class="loader"></div> */
.loader {
    height: 4px;
    width: 100%;
    --c:no-repeat linear-gradient(#8a0020 0 0);
    background: var(--c),var(--c), #f17189;
    background-size: 60% 100%;
    animation: l16 3s infinite;
}
@keyframes l16 {
    0%   {background-position:-150% 0,-150% 0}
    66%  {background-position: 250% 0,-150% 0}
    100% {background-position: 250% 0, 250% 0}
}