Only CSS: Double Dice

1<div id="ui">
2    <div class="dice">
3        <ol class="dice_list">
4            <li class="dice_item" data-id="1">1</li>
5            <li class="dice_item" data-id="2">2</li>
6            <li class="dice_item" data-id="3">3</li>
7            <li class="dice_item" data-id="4">4</li>
8            <li class="dice_item" data-id="5">5</li>
9            <li class="dice_item" data-id="6">6</li>
10        </ol>
11    </div>
12</div>