<?xml version="1.0"?>
<!DOCTYPE window>
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" align="start">
  <grid>
    <rows>
      <row>
        <box style="width: 25px; height: 25px" />
        <box />
      </row>
      <row>
        <box />
        <box style="width: 75px; height: 75px" />
      </row>
    </rows>
    <columns>
      <column>
        <box style="background: aqua" />
        <box style="background: yellow; width: 50px; height: 50px" />
      </column>
      <column>
        <box style="background: fuchsia; width: 100px; height: 100px" />
        <box style="background: blue" />
      </column>
    </columns>
  </grid>
</window>
