1 <layers>

     2 	<visual>

     3 	    <param name="opacity" type="anim">

     4 	        <duration>0.3</duration>

     5 	        <keyframe at="0.0">0.0</keyframe>

     6 	        <keyframe at="1.0">1.0</keyframe>

     7 	    	</param>

     8 	</visual>

     9 </layers>