/* Linear gradient pattern */

.repeat {
  background-image: 
    repeating-linear-gradient(
      45deg,
      yellow,
      yellow 10px,
      red 10px,
      red 20px /* determines size */
    );
}

/* Radial gradient pattern */

.repeat {
  background: 
    repeating-radial-gradient(
      circle at 0 0, 
      #eee,
      #ccc 50px
    );
}