Column 4 has 3 beads. Column 3 has 3 beads. Same depth → red (=).
- Column 5 starts, so use Rule 1: compare Column 4 with Column 3, 1 column further back.
- Column 4 has 3 beads. Column 3 has 3 beads. Same depth → red (=).
Common table reading watchout: Comparing the wrong columns. Compare Column 4, the one that just finished, with Column 3.