<P> The circle in the middle is derived from the philosophy of yin - yang and represents balance in the universe . The red half represents positive cosmic forces, and the blue half represents the opposing negative cosmic forces . </P> <P> Together, the trigrams represent movement and harmony as fundamental principles . Each trigram (hangeul: 괘 (gwae); hanja: 卦) represents one of the four classical elements, as described below: </P> <Table> <Tr> <Th> Trigram </Th> <Th> Korean Name </Th> <Th> Celestial Body </Th> <Th> Season </Th> <Th> Cardinal Direction </Th> <Th> Virtue </Th> <Th> Family </Th> <Th> Natural Element </Th> <Th> Meaning </Th> </Tr> <Tr> <Td> ☰ </Td> <Td> geon (건 / 乾) </Td> <Td> heaven (천 / 天) </Td> <Td> spring (춘 / 春) </Td> <Td> east (동 / 東) </Td> <Td> humanity (인 / 仁) </Td> <Td> father (부 / 父) </Td> <Td> heaven (천 / 天) </Td> <Td> justice (정의 / 正義) </Td> </Tr> <Tr> <Td> ☲ </Td> <Td> ri (리 / 離) </Td> <Td> sun (일 / 日) </Td> <Td> autumn (추 / 秋) </Td> <Td> south (남 / 南) </Td> <Td> justice (의 / 義) </Td> <Td> daughter (녀 / 女) </Td> <Td> fire (화 / 火) </Td> <Td> fruition (결실 / 結實) </Td> </Tr> <Tr> <Td> ☵ </Td> <Td> gam (감 / 坎) </Td> <Td> moon (월 / 月) </Td> <Td> winter (동 / 冬) </Td> <Td> north (북 / 北) </Td> <Td> intelligence (지 / 智) </Td> <Td> son (자 / 子) </Td> <Td> water (수 / 水) </Td> <Td> wisdom (지혜 / 智慧) </Td> </Tr> <Tr> <Td> ☷ </Td> <Td> gon (곤 / 坤) </Td> <Td> earth (지 / 地) </Td> <Td> summer (하 / 夏) </Td> <Td> west (서 / 西) </Td> <Td> courtesy (례 / 禮) </Td> <Td> mother (모 / 母) </Td> <Td> earth (토 / 土) </Td> <Td> vitality (생명력 / 生命力) </Td> </Tr> </Table> <Tr> <Th> Trigram </Th> <Th> Korean Name </Th> <Th> Celestial Body </Th> <Th> Season </Th> <Th> Cardinal Direction </Th> <Th> Virtue </Th> <Th> Family </Th> <Th> Natural Element </Th> <Th> Meaning </Th> </Tr>

What do the lines in the korean flag mean
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