<layers>

<visual>

<param name="scale_x" type="anim">

    <duration>0.3</duration>

    <style>linear</style>

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

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

    <start ref="visual.width">1</start>

    <end ref="screen.width">1</end>

</param>

<param name="scale_y" type="anim">

    <duration>0.3</duration>

    <style>linear</style>

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

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

    <start ref="visual.height">1</start>

    <end ref="screen.height">1</end>

</param>

<param name="scale_origin_x" ref="screen.width">0.5</param>

<param name="scale_origin_y" ref="screen.height">0.5</param>

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

<duration>0.3</duration>

<style>linear</style>

<keyframe at="0.0">1.0</keyframe>

<keyframe at="0.5">1.0</keyframe>

<keyframe at="1.0">0.5</keyframe>

</param>

</visual>

</layers>