.foot{background-image:url(footprint.png);position:absolute;opacity:.7}.foot.thin{width:80px;height:120px}.foot.thin.left{width:28px;height:70px;background-position:-7px -8px}.foot.thin.right{width:31px;height:73px;background-position:-43px -41px}.foot.small.left{width:9px;height:20px;background-position:-0px -0px}.foot.small.right{width:9px;height:20px;background-position:-17px -4px}