- var n = 1;
ol
    while n <= 100
        li= `Item ${n++}`

ol {
    // Define & Initialize Counter
    counter-reset: items;
    list-style-type: none;
}
li {
    // Increment Counter
    counter-increment: items;

    &:before {
        color: red;
        // Display Counter
        content: "00" counter(items) ". ";
    }

    &:nth-child(n + 10):before {
        // Display Counter
        content: "0" counter(items) ". ";
    }

    &:nth-child(n + 100)::before {
        // Display Counter
        content: counter(items) ". ";
    }
}