Sourcecode:

<?xml version="1.0"?>
<effect>
  <particle> 
   <emitter>
    <property name="output" value= "1" />                              <!-- We want one new particle per game tick -->
    <property name="lifetime" value= "10" />                           <!-- we want each particle to survive for 10 game ticks -->
    <property name="image" value="graphics/particles/star-medium.png"/><!-- We want the particles to look like white stars. -->
    <property name="position-x" min="0" max="32 />                     <!-- We want the particles to be spawned in an area 32 pixels wide...-->
    <property name="position-y" min="0" max="32 />                     <!-- ...32 pixels deep and...-->
    <property name="position-z" min="0" max="32" />                    <!-- ...32 pixels high.  -->
   </emitter>
  </particle>
</effect>