-In this diagram, we show how the object relationships change during the
-course of the game. The straight lines represent parent--child
-relationships, with the parent object at the top of the line, and the child
-object at the bottom.
+Here we show how the object relationships change during the course of the
+game. The straight lines represent parent--child relationships, with the
+parent object at the top of the line, and the child object at the bottom.
+
+1. At the start of the game:
+
+ .. blockdiag:: /figures/heidiobj1.diag
+ :align: center
+ :scale: 80%
+
+2. The player types: ``GO EAST``
+
+ .. blockdiag:: /figures/heidiobj2.diag
+ :align: center
+ :scale: 80%
+
+3. The player types: ``TAKE THE BIRD``
+
+ .. blockdiag:: /figures/heidiobj3.diag
+ :align: center
+ :scale: 80%
+
+4. The player types: ``GO NORTHEAST``