
You can draw the floorplans of a house.  Closed polygons are 
recognized as regions in the house.  Draw squares on the walls
to make doors.  You can select a region by clicking on it.  
Clicking on it again deletes it.  You can divide regions by
drawing lines through them.

Things you can say:
      "Delete the kitchen"      
      "Delete that"
      "Region 0 is a bedroom"
      "Undo that"
      "Redo that"
      "Name the kitchen"

                      (click on me to get rid of me)
