<div class="gradient"></div>

.gradient {
  height: 250px;
  background-color: #ff8a00;
  background-image: repeating-radial-gradient(
    circle at 0 0,
    #ff8a00,
    #ff8a00 10px,
    #e52e71 10px,
    #e52e71 20px /* determines size */
  );
}