<ul class="unordered-list">
    <li class="list-ele">List 1
        <ul class="unordered-list">
            <li class="list-ele">List 2</li>
            <li class="list-ele">List 3</li>
        </ul>
    </li>
    <li class="list-ele">List 2</li>
    <li class="list-ele">List 3
        <ul class="unordered-list">
            <li class="list-ele">List 2</li>
            <li class="list-ele">List 3</li>
        </ul>
    </li>
    </li>
    <li class="list-ele">List 4</li>
</ul>