title: powerpoint loop a series of animation
body: <p>I am currently working on a slide with an animation of sunrise to sunset as a background.
  Then there are some pictures fade in and fade out.</p>
  
  <p>Now, I am having difficult to loop the series of animation that repeat the pictures fade in and fade out until sunset.</p>
  
  <p>I am trying to avoid manual timing setting because the duration from sunrise to sunset is 1 hour and there are only 5 pictures to repeat the fade in and fade out that takes only 10 secs for each picture.</p>
  
  <p>Appreciate your help!</p>