code: function loaded () {
      var
        loading = document.getElementById( 'loading' ),
        anchor  = document.createElement('A'),
        supported = Dancer.isSupported(),
        p;
  
      anchor.appendChild( document.createTextNode( supported ? 'Play!' : 'Close' ) );
      anchor.setAttribute( 'href', '#' );
      loading.innerHTML = '';
      loading.appendChild( anchor );
  
      if ( !supported ) {
        p = document.createElement('P');
        p.appendChild( document.createTextNode( 'Your browser does not currently support either Web Audio API or Audio Data API. The audio may play, but the visualizers will not move to the music; check out the latest Chrome or Firefox browsers!' ) );
        loading.appendChild( p );
      }
  
      anchor.addEventListener( 'click', function () {
        dancer.play();
        document.getElementById('loading').style.display = 'none';
      });
    }
docs: /*
  Loading