<div class="my-element"></div>
.my-element {
  background: repeating-linear-gradient(
    45deg,
    red,
    red 30px,
    white 30px,
    white 60px
  );
  border: 10px solid;
}

/* Presentational styles */
.my-element {
  width: 250px;
  height: 250px;
}

External CSS

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External JavaScript

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