Star Gauge [1] is fascinating. Thanks OP. > The outer border is meant to be read in a circle. The grid is known as a palindrome poem, and can be read in diffe

Star Gauge [1] is fascinating. Thanks OP. > The outer border is meant to be read in a circle. The grid is known as a palindrome poem, and can be read in different ways to generate over 3,000 shorter poems, in which the second line of every couplet rhymes with that of the next. [1] https://en.wikipedia.org/wiki/Su_Hui%27s_Star_Gauge https://en.wikipedia.org/wiki/Su_Hui%27s_Star_Gauge