Test passes if ...
- the bottom of glyph 'L' is touching a thin blue line in each 3 orange rectangles and
- the right edge of yellow square is touching a thin blue line in each 3 orange rectangles and
- all 3 orange rectangles are identical.
LLLLLLL
LLLLLL
LLLLLLL
LLLLLL
LLLLLLL
LLLLLL