.custom-loader {
    width:120px;
    height:22px;
    border-radius: 20px;
    color:#A70A1B;
    border:2px solid;
    position: relative;
  }
  .custom-loader::before {
    content:"";
    position: absolute;
    margin:2px;
    inset:0 100% 0 0;
    border-radius: inherit;
    background:#A70A1B;
    animation:p6 4s infinite;
  }
  @keyframes p6 {
      100% {inset:0}
  }