I Ching divination is a form of cleromancy applied to the I Ching. The text of the I Ching consists of sixty-four hexagrams: six-line figures of yin (broken) or yang (solid) lines, and commentaries on them. There are two main methods of building up the lines of the hexagram, using either 50 yarrow sticks or three coins. Some of the lines may be designated "old" lines, in which case the lines are subsequently changed to create a second hexagram. The text relating to the hexagram(s) and old lines (if any) is studied, and the meanings derived from such study can be interpreted as an oracle. Methods Each hexagram is six lines, written sequentially one above the other; each of the lines represents a state that is either yin ( : dark, feminine, etc., represented by a broken line) or yang ( : light, masculine, etc., a solid line), and either old (moving or changing, represented by an "X" written on the middle of a yin line, or a circle written on the middle of a yang line) or young (static, unchanging). The usual methods for consulting the I Ching as an oracle produce a "sacred" or "ritual" number for each type of line: 6 (for an old yin line), 7 (young yang), 8 (young yin), or 9 (old yang). The six lines are produced in order using the chosen method (see below for examples), beginning at the first (lowest) one and proceeding upward to the sixth (uppermost) line, each with its corresponding number. Then, the commentaries applying to the generated hexagram are studied; if the hexagram contains no old lines at all, that concludes the consultation, but if there are one or more old lines, the separate commentary for each such line is also studied. Then, the lines are appropriately changed (any old yin lines into young yang lines, and any old yang lines into young yin lines), which—with the young lines in the original hexagram remaining the same—results in a second, different, hexagram, the commentarial material on which is then also studied. The method used by the diviner to generate the hexagram(s) depends on their circumstances and beliefs; the yarrow-stalk method is usually employed by traditionalists who find significance in its complexity, and in the resulting time needed to manipulate the stalks to produce a hexagram. Coin methods, and others, are used either by those short of time, or