<layers>
<visual>

  <param name="opacity" type="anim">
      <duration>1.0</duration>
      <style>linear</style>
      <keyframe at="0">0</keyframe>
      <keyframe at="0.2">0</keyframe>
      <keyframe at="0.5">1</keyframe>
  </param>
  
	<param name="rotation_angle" type="anim">
            <duration>0.5</duration>
            <style>outquad</style>
            <keyframe at="0">90</keyframe>
            <keyframe at="1">0</keyframe>
	</param>

	<param name="rotation_origin_x" ref="visual.width">0.5</param>
	<param name="rotation_origin_y" ref="visual.height">0.5</param>
	
	<param name="rotation_axis_x" type="anim">0</param>
	<param name="rotation_axis_y" type="anim">0</param>
	<param name="rotation_axis_z" type="anim">1</param>        

</visual>
</layers>