Elements showing like sequenially

$("#dropDownMenu li").each(function(i) {
    $(this).delay(100 * i).fadeIn(500);
});
.sub-menu {
    position: absolute;
    z-index: 1000;
    /* color: #fff;
    right: 5px; */
}

.sub-menu li {
    display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="sub-menu" id="dropDownMenu">
    <ul id="navbar">
        <li> First</li>
        <li>Second</li>
        <li>Third</li>
        <li>Fourth</li>
        <li>Fifth</li>
    </ul>
</div>