black flag Jolly Roger Pirate Flag pirates Skull and Crossbones appearance danger flag Flags jolly-roger pirate-flag sign skull-and-crossed-bones symbol symbolic traditional warning ball balls branch cane christmas decoration holiday jolly neddle ornament pop toy tree x-mas xmas candle cracker fire Alster boat boats boats bridge dinghis germany hamburg idyll jolly-boat lake landing stage marina mast reflections river ships water wherry yacht bear Bismarck close drum needles pine teddy UP aecurity Błyskawica destroyer dinghy launch life-boat line nautical pinnace Poland rescue safe see vessel warship work yawl yowl background blue color colour dingey frost off-season orange red sailing snow streaks sunny texture turquoise upside-down winter