File:Particle-tutorial-firefountain-nested.png

source:

<?xml version="1.0"?>
<effect>
  <particle
    position-x = "0"
    position-y = "0"
    position-z = "0">
    <emitter>
      <property name="output" min="-4" max="1" />  <!--Keep it low this time...-->
      <property name="horizontal-angle" min="0" max="360" /> 
      <property name="vertical-angle" value="70" />
      <property name="power" value="4" />
      <property name="gravity" value="0.1" />
      <property name="bounce" value="0.7" />
      <property name="lifetime" value="250" />
      <property name="image" value="graphics/particles/orb-medium.png|W:#ff0000"/>
      <emitter>
        <property name="power" value="0.5"/>
        <property name="horizontal-angle" min="0" max="360"/>
        <property name="vertical-angle" min="0" max="360"/>
        <property name="lifetime" value="20"/>
        <property name="output" min="0" max="1"/>
        <property name="image" value="graphics/particles/star-small.png|W:#ff8800,ffffff"/>
      </emitter>
    </emitter>
  </particle>
</effect>