Shape

331 Chinese Lattice Designs—Seeing What You Do
The four lattices I’ve shown are checkerboard designs like this one
in which a given motif
is inscribed in squares in a rectangular array. The ‘‘H’’ alternates this way and that, left
to right from side to side
to correspond to contrasting colors or distinct labels (symbols). This makes it easy
to use my schemas—first, x fi x þ tðxÞ to produce the checkerboard pattern, followed
by x fi divðxÞ to inscribe the H and divide squares. There are two rules for the
checkerboard
where x is a square and an asymmetrically placed point to orient the H with respect to
left and right diagonals. And going back and forth from rule 1 to rule 2, I get the series
of shapes