lc(100% - 1px) -100px,
            calc(100% + 100px) calc(100% - 1px), 1px -100px;
        }
        30% {
          background-position: 100% 1px, calc(100% - 1px) -100px,
            calc(100% + 100px) calc(100% - 1px), 1px -100px;
        }
        35% {
          background-position: calc(100% + 100px) 1px, calc(100% - 1px) 0px,
            calc(100% + 100px) calc(100% - 1px), 1px -100px;
        }
        50% {
          background-position: calc(100% + 100px) 1px, calc(100% - 1px) 100%,
            c