The width of the strip chosen for the first level de Bruijn diagram varies from 1 to 6 according to the options A to F. Wider strips are not available simply because of memory limitations, but execution time would also be a consideration if the strips were much wider.
The strip option calculates the second level de Bruijn diagram, which
describes the sequencing of the partial strips (actually, it has been
edited so that only loops remain). The number of nodes can be very
large - up to 
for a strip of width w - , so the final
display is adjusted accordingly. If 
, the connectivity matrix
is displayed using 2x2 pixels on a green background.
Otherwise, if 
, the connectivity matrix is displayed with
1x1 pixels. If there are still more nodes, no matrix at all is shown.
In every case, it is possible to obtain a listing of the matrix elements of the second level matrix.