diff -r 36a6cb6dc429 apps/toys/Hello/src/main/java/hello/HelloButton.java
--- a/apps/toys/Hello/src/main/java/hello/HelloButton.java	Wed Mar 12 07:54:46 2014 +0100
+++ b/apps/toys/Hello/src/main/java/hello/HelloButton.java	Wed Mar 19 15:22:58 2014 +0200
@@ -55,17 +55,17 @@
 
         ((Group)scene.getRoot()).getChildren().add(button);
 
-        button = new Button();
-        button.setText("Click Me Too");
-        button.setLayoutX(25);
-        button.setLayoutY(70);
-        ((Group)scene.getRoot()).getChildren().add(button);
+        Button button1 = new Button();
+        button1.setText("Click Me Too");
+        button1.setLayoutX(25);
+        button1.layoutYProperty().bind(button.heightProperty().add(button.layoutYProperty()));
+        ((Group)scene.getRoot()).getChildren().add(button1);
 
-        button = new Button();
-        button.setText("Click Me Three");
-        button.setLayoutX(25);
-        button.setLayoutY(100);
-        ((Group)scene.getRoot()).getChildren().add(button);
+        Button button2 = new Button();
+        button2.setText("Click Me Three");
+        button2.setLayoutX(25);
+        button2.layoutYProperty().bind(button1.heightProperty().add(button1.layoutYProperty()));
+        ((Group)scene.getRoot()).getChildren().add(button2);
 
         stage.setScene(scene);
         stage.show();