شمارش معکوس

<ul class="countdown mb-0">
    <!-- days -->
    <li><span class="days">00</span>
        <p class="timeRefDays">days</p>
    </li>
    <!-- end days -->
    <!-- hours -->
    <li><span class="hours">00</span>
        <p class="timeRefHours">hours</p>
    </li>
    <!-- end hours -->
    <!-- minutes -->
    <li><span class="minutes">00</span>
        <p class="timeRefMinutes">minutes</p>
    </li>
    <!-- end minutes -->
    <!-- seconds -->
    <li><span class="seconds">00</span>
        <p class="timeRefSeconds">seconds</p>
    </li>
    <!-- end seconds -->
</ul>