.icon-github{background-image:url(sprite.png);background-position:0 0;width:64px;height:64px}.icon-google-drive{background-image:url(sprite.png);background-position:-64px 0;width:64px;height:64px}.icon-rss{background-image:url(sprite.png);background-position:0 -64px;width:64px;height:64px}.icon-vimeo{background-image:url(sprite.png);background-position:-64px -64px;width:64px;height:64px}