The log cabin patchwork style is generally associated with America, in particular the early pioneers. There are anecdotal stories of them being used during the Civil War as signals.
There are however British examples pre-dating the existence of America, and, apparently Ancient Egyptian examples too.
Traditionally, they are hand sewn, and are light on one side, dark on the other, and the 'central' square is either red or yellow.
The central square represents 'the hearth'
This is ACTUALLY square, but the only decent surface I had in the hotel was the spare bed, which wasn't completely flat!