div {
  background-image: -webkit-repeating-radial-gradient(#000,#000 5px,#fff 5px,#fff 10px);
  background-image: repeating-radial-gradient(#000,#000 5px,#fff 5px,#fff 10px);
}
div {
  background-image: -webkit-repeating-radial-gradient(ellipse farthest-corner,#f00,#000 5%,#00f 5%,#008000 10%);
  background-image: repeating-radial-gradient(ellipse farthest-corner,#f00,#000 5%,#00f 5%,#008000 10%);
}