<box xmlns="
http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<stack style="align-items: start; justify-items: left;">
<label style="margin-top: 20px; margin-left: 20px; color: green;" value="Hello!"/>
<label style="margin-top: 24px; margin-left: 24px; color: black;" value="Hello!"/>
</stack>
</box>
