1 <layers>

     2 <visual>

     3 

     4 <param name="translation_y" type="anim">

     5 <duration>0.4</duration>

     6 <style>linear</style>

     7       <keyframe at="0">0</keyframe>

     8       <keyframe at="1">1</keyframe>

     9 <start ref="visual.top">1</start>

    10 <end ref="screen.bottom">1</end>

    11 </param>

    12 

    13 </visual>

    14 </layers>