Remove hack for mis-wired cube

Signed-off-by: Paul Brook <paul@nowt.org>
Fix wonky demo code

Signed-off-by: Paul Brook <paul@nowt.org>
Run indefinitely if only one pattern

Signed-off-by: Paul Brook <paul@nowt.org>
Better scroller message

Signed-off-by: Paul Brook <paul@nowt.org>
Plasma worm

Signed-off-by: Paul Brook <paul@nowt.org>