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 stalks 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.