fgdata/Aircraft/Instruments/gear-indicator.xml

<?xml version="1.0"?>
<!--
 A simple indicator lamp. Used here as a brake light.
 John Check <j4strngs@usa.net>
-->

<PropertyList>
 <name>Gear Indicator</name>
 <w-base>64</w-base>
 <h-base>26</h-base>

 <layers>
<!-- The "bulb" -->
 <layer>
   <name>Brake light</name>
   <type>switch</type>
   <property>/controls[0]/gear-down</property> <!-- nose brake -->
    <layer>
     <name>on</name>
     <texture>
     <path>Aircraft/Instruments/Textures/warning-lamps.rgb</path>
     <x1>0.25</x1>
     <y1>0.0</y1>
     <x2>0.5</x2>
     <y2>0.095</y2>
     </texture>
     <w>64</w>
     <h>26</h>
    </layer>
    <layer>
     <name>off</name>
     <texture>
     <path>Aircraft/Instruments/Textures/warning-lamps.rgb</path>
     <x1>0.0</x1>
     <y1>0.0</y1>
     <x2>0.25</x2>
     <y2>0.095</y2>
     </texture>
     <w>64</w>
     <h>26</h>
   </layer>
  </layer>
<!-- translucent lens -->  
  <layer>
   <name>lens</name>
   <texture>
    <path>Aircraft/Instruments/Textures/warning-lamps.rgb</path>
     <x1>0.74609375</x1>
     <y1>0.0</y1>
     <x2>1.0</x2>
     <y2>0.08984375</y2>
   </texture>
   <w>64</w>
   <h>26</h>
  </layer>
 </layers>

</PropertyList>