QingYang gong temple - Taoist trigrams of ba gua

Here they are in order : Fire, Earth, Lake, Heaven. There are 4 more (out of a total of 8) to represent : Water, Lightning, Wind and Mount.
Note 1 : There are 64 hexagrams each combining two trigrams (8x8).
Note 2 : The Korean flag shows the trigrams Earth, Heaven, Fire and Water.