anchor.diff:  
               //Centre on all elements in the graph.
               cy.center();
  -            // giddy up
  +
               nodes = cy.$('node');
               edges = cy.$('edge');
   
               nodes.one('click', function(e){
                   var node = e.cyTarget;
  -                nodes.css('opacity',0.5);
  +                nodes.css('opacity',0.3);
  +                nodes.css('width',150);
  +                nodes.css('height',30);
                   edges.css('opacity',0.2);
                   node.css('opacity',1);
                   edges.each(function(i, edge){
  
positive.code: 
                  .selector('edge')
                  .css({
                      'width': 'mapData(strength, 70, 100, 2, 6)',
                      'target-arrow-shape': 'triangle',
                      'line-color': 'data(faveColor)',
                      'source-arrow-color': 'data(faveColor)',
  
negative.code:                         source.css('opacity',1);
                      }
                  });
  
                  node.animate({
                      css: { width:200, height:40 }
                  }, {
                      duration: 300
                  });
  
  
              });
  
  