anchor.diff:  
     // Pyramids
   
  -  geometry = new CylinderGeometry( 0, 10, 30, 4, 1 );
  +  geometry = new CylinderGeometry( 0.0, 10.0, 30.0, 4, 1 );
     material = new MeshLambertMaterial( color: 0xffffff, shading: FlatShading );
   
     var rnd = new Math.Random();
  
positive.code: import 'dart:html';
  import 'dart:math' as Math;
  import 'package:vector_math/vector_math.dart';
  import 'package:three/three.dart';
  import 'package:three/extras/controls/trackball_controls.dart';
  
    Element container;
  
    OrthographicCamera camera;
    Scene scene;
    CanvasRenderer renderer;
  
    TrackballControls controls;
  
  void main() {
    init();
  
negative.code:                   ''';
    container.nodes.add( info );
  
    camera = new PerspectiveCamera( 60.0, window.innerWidth / window.innerHeight, 1.0, 1000.0 );
    camera.position.z = 500.0;
  
    controls = new TrackballControls( camera );
  