For both of these reasons, I use a variant of the traditional yarrow protocol that I call the stone protocol. I follow the exact protocol used by those who use yarrow stalks, but instead of yarrow stalks, I use material that slides on a flat surface. My favorite material is Go stones, that is, the playing pieces of the ancient game of Go. Go stones are small flat stones that are attractive to look at, pleasing to hold, and easily manipulated with the fingers. If you have a good game store nearby, you should be able to buy a nice set of Go stones without spending too much money. Buy “double convex” stones if you have a choice. A standard set of Go stones is over 300 stones which is far overkill for what we will use (50 stones.) Perhaps you can go in with some friends.
- The items should not roll around.
- About 50 of the items should fit comfortably but not be lost in your two hands.
- The items should be large enough and smooth enough to easily manipulate by dragging them around with your fingers.
- The items should all look roughly similar and be similar sizes.
- 6 means a changing yin line (broken line moving to solid.)
- 7 means a static yang line (solid line not moving.)
- 8 means a static yin line (broken line not moving.)
- 9 means a changing yang line (solid moving to broken.)