Column 6 has 2 beads. Column 3 has 2 beads. Same depth → red (=).
- Column 7 starts, so use Rule 1: compare Column 6 with Column 3, 3 columns further back.
- Column 6 has 2 beads. Column 3 has 2 beads. Same depth → red (=).
Common table reading watchout: Comparing the wrong columns. Compare Column 6, the one that just finished, with Column 3.