var svg = Pablo(demoElement).svg({height: 100}),
    sizes = [50, 30, 10];

Pablo([
     Pablo.circle({cx:50, cy:50, fill: 'cyan'}),
     Pablo.circle({cx:50, cy:50, fill: 'black'}),
     Pablo.circle({cx:50, cy:50, fill: 'red'})
   ])
  .reverse() // Remove reverse to see the new order
  .each(function (item, i) {
    Pablo(item).attr('r', sizes[i]);
    svg.append(item);
  });