diff --git a/examples/layers/widgets/spinning_mixed.dart b/examples/layers/widgets/spinning_mixed.dart
new file mode 100644
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+++ b/examples/layers/widgets/spinning_mixed.dart
@@ -0,0 +1,102 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+
+import '../rendering/src/solid_color_box.dart';
+
+// Solid colour, RenderObject version
+void addFlexChildSolidColor(RenderFlex parent, Color backgroundColor, { int flex: 0 }) {
+  RenderSolidColorBox child = new RenderSolidColorBox(backgroundColor);
+  parent.add(child);
+  FlexParentData childParentData = child.parentData;
+  childParentData.flex = flex;
+}
+
+// Solid colour, Widget version
+class Rectangle extends StatelessComponent {
+  Rectangle(this.color, { Key key }) : super(key: key);
+  final Color color;
+  Widget build(BuildContext context) {
+    return new Flexible(
+      child: new Container(
+        decoration: new BoxDecoration(backgroundColor: color)
+      )
+    );
+  }
+}
+
+double value;
+RenderObjectToWidgetElement<RenderBox> element;
+void attachWidgetTreeToRenderTree(RenderProxyBox container) {
+  element = new RenderObjectToWidgetAdapter<RenderBox>(
+    container: container,
+    child: new Container(
+      height: 300.0,
+      child: new Column(
+        children: <Widget>[
+          new Rectangle(const Color(0xFF00FFFF)),
+          new Material(
+            child: new Container(
+              padding: new EdgeDims.all(10.0),
+              margin: new EdgeDims.all(10.0),
+              child: new Row(
+                children: <Widget>[
+                  new RaisedButton(
+                    child: new Row(
+                      children: <Widget>[
+                        new NetworkImage(src: "http://flutter.io/favicon.ico"),
+                        new Text('PRESS ME'),
+                      ]
+                    ),
+                    onPressed: () {
+                      value = value == null ? 0.1 : (value + 0.1) % 1.0;
+                      attachWidgetTreeToRenderTree(container);
+                    }
+                  ),
+                  new CircularProgressIndicator(value: value),
+                ],
+                justifyContent: FlexJustifyContent.spaceAround
+              )
+            )
+          ),
+          new Rectangle(const Color(0xFFFFFF00)),
+        ],
+        justifyContent: FlexJustifyContent.spaceBetween
+      )
+    )
+  ).attachToRenderTree(element);
+}
+
+Duration timeBase;
+RenderTransform transformBox;
+
+void rotate(Duration timeStamp) {
+  if (timeBase == null)
+    timeBase = timeStamp;
+  double delta = (timeStamp - timeBase).inMicroseconds.toDouble() / Duration.MICROSECONDS_PER_SECOND; // radians
+
+  transformBox.setIdentity();
+  transformBox.translate(transformBox.size.width / 2.0, transformBox.size.height / 2.0);
+  transformBox.rotateZ(delta);
+  transformBox.translate(-transformBox.size.width / 2.0, -transformBox.size.height / 2.0);
+}
+
+void main() {
+  WidgetFlutterBinding.ensureInitialized();
+  RenderProxyBox proxy = new RenderProxyBox();
+  attachWidgetTreeToRenderTree(proxy);
+
+  RenderFlex flexRoot = new RenderFlex(direction: FlexDirection.vertical);
+  addFlexChildSolidColor(flexRoot, const Color(0xFFFF00FF), flex: 1);
+  flexRoot.add(proxy);
+  addFlexChildSolidColor(flexRoot, const Color(0xFF0000FF), flex: 1);
+
+  transformBox = new RenderTransform(child: flexRoot, transform: new Matrix4.identity());
+  RenderPadding root = new RenderPadding(padding: new EdgeDims.all(80.0), child: transformBox);
+
+  WidgetFlutterBinding.instance.renderView.child = root;
+  WidgetFlutterBinding.instance.addPersistentFrameCallback(rotate);
+}