<svg viewBox="0 0 32 32" width="192" height="192" xmlns="http://www.w3.org/2000/svg"  xmlns:xlink="http://www.w3.org/1999/xlink">
  <defs>
    <circle id="c4-chip" cx="0" cy="0" r="6" stroke-width="1" />
    <use id="c4-blue-chip" xlink:href="#c4-chip" fill="#36c" stroke="#149" />
    <use id="c4-red-chip" xlink:href="#c4-chip" fill="#c33" stroke="#900" />
  </defs>
  <rect x="0" y="0" width="100%" height="100%" fill="#fff" rx="3" ry="3" />
  <use xlink:href="#c4-red-chip" x="8" y="8" />
  <use xlink:href="#c4-blue-chip" x="8" y="24" />
  <use xlink:href="#c4-red-chip" x="24" y="24" />
</svg>

Add empty slot to app icon
Add empty slot to app icon
