2025-09-26-  This is a first working model ( incomplete ) of a single Vertical Line.
  It's incomplete because I was just testing the display and needed a concept area so I chose adverbs of degree - and then applied it to 'Levels of Difficulty' which is why the vocabulary displayed on the States Mode ( first page ) only shows the adverbs without 'difficulty' but change to the Transitions mode where you'll see I have successfully created a system for storing and presenting vocabulary depending on whether it is increasing or decreasing. 
More work still needs to be done.
ALan William Preston . Mangawhai , New Zealand.