body {
    margin: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to right bottom, dimgray, black);
}

ul {
    padding: 0;
}

li {
    list-style-type: none;
    border: 2px solid transparent;
    border-left-color: silver;
    padding-left: 2em;
    transition: 500ms;
    margin: 1em 0;
}

li:hover {
    border-left-color: white;
}

li span {
    color: white;
    font-size: 30px;
    font-family: monospace;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    transition: 500ms;
}

li:hover span {
    color: #333;
    transition-delay: calc(50ms * var(--n) + 100ms);
}

li span::before {
    content: '';
    position: absolute;
    height: 100%;
    width: 0%;
    border-radius: 0.1em;
    z-index: -1;
    transition: 500ms;
}

li:hover span::before {
    width: 80%;
    background-color: white;
    transform: rotate(-25deg);
    transition-delay: calc(50ms * var(--n));
}

li span:nth-child(1) {--n: 1;}
li span:nth-child(2) {--n: 2;}
li span:nth-child(3) {--n: 3;}
li span:nth-child(4) {--n: 4;}
li span:nth-child(5) {--n: 5;}
li span:nth-child(6) {--n: 6;}
li span:nth-child(7) {--n: 7;}
li span:nth-child(8) {--n: 8;}