If you like the West Frisian flag wait until you see North Frisia's coat of arms. That's a pot of (red?) grit there, and the motto is "Better dead than slave". Just don't try to conquer them and they're perfectly pleasant to be around with and share a state with, rather cooking grit than looking for trouble. (Not identical to the coat of the district of Nordfriesland, that's quite a bit more territory than North Frisia proper).