What are the five lines in the number 1-20? What is the number of fires?

1 and 2 are wood; 3, 4 fires; 5, 6 soil; 7, 8 gold; 9. 10 water; The last digit in the future is 1, and 2 is wood, such as 1 1,12,21,22,31,32 and so on! Fire number 3, 4, 13, 14, 23, 24, .......