100px;
        background-position: -100px 1px, calc(100% - 1px) -100px,
          calc(100% + 100px) calc(100% - 1px), 1px 0px;
        animation: moveLine 8s infinite linear;
        height: calc(100% - 2px);
        padding: 1px;
        background-clip: content-box;
      }

      @keyframes moveLine {
        0% {
          background-position: -100px 1px, calc(100% - 1px) -100px,
            calc(100% + 100px) calc(100% - 1px), 1px 0px;
        }
        5% {
          background-position: 0px 1px, ca