background: repeating-radial-gradient(#e66465, #9198e5 20%);

background: repeating-radial-gradient(closest-side, #3f87a6, #ebf8e1, #f69d3c);

background: repeating-radial-gradient(circle at 100%, #333, #333 10px, #eee 10px, #eee 20px);