u'><a href='mapdeck.html'>mapdeck</a></span>( <span class='kw'>style</span> <span class='kw'>=</span> <span class='fu'><a href='mapdeck_style.html'>mapdeck_style</a></span>(<span class='st'>"dark"</span>), <span class='kw'>pitch</span> <span class='kw'>=</span> <span class='fl'>45</span> ) <span class='kw'>%&gt;%</span>
  <span class='fu'>add_animated_arc</span>(
  <span class='kw'>data</span> <span class='kw'>=</span> <span class='no'>flights</span>
  , <span class='kw'>layer_id</span> <span class='kw'>=</