.checkerboard{background-position:0px 0px,10px 10px;background-size:20px 20px;background-image:linear-gradient(45deg,#eee 25%,transparent 25%,transparent 75%,#eee 75%,#eee 100%),linear-gradient(45deg,#eee 25%,white 25%,white 75%,#eee 75%,#eee 100%)}