Sample markup for the tutorial on Retina Sprites at http://ahmedkaludi.com/retina-sprites/

Retina Sprites

<div class="candy">
            <ul>
                <li class="candyicons facebook"><a href="#"></a></li>
                <li class="candyicons instagram"><a href="#"></a></li>
                <li class="candyicons medium"><a href="#"></a></li>
                <li class="candyicons snapchat"><a href="#"></a></li>
                <li class="candyicons twitter"><a href="#"></a></li>
                <li class="candyicons youtube"><a href="#"></a></li>
            </ul>
        </div>