Rounded layered squares patterns

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  <defs>
    <pattern id="dbc-pattern-2830cd4e-7d5c-493b-a6b3-53632ac20f38" width="50" height="50" x="0" y="0" patternTransform="rotate(0) skewX(0) scale(1)" patternUnits="userSpaceOnUse">
      <rect width="40" height="40" x="5" y="5" fill="none" stroke="currentColor" stroke-width="1.5" rx="10"/>
      <rect width="30" height="30" x="5" y="5" fill="none" stroke="currentColor" stroke-width="1.5" rx="8"/>
      <rect width="20" height="20" x="6" y="6" fill="currentColor" stroke-width="1.5" rx="6"/>
    </pattern>
  </defs>
  <rect width="100%" height="100%" fill="url(#dbc-pattern-2830cd4e-7d5c-493b-a6b3-53632ac20f38)"/>
</svg>