Second article in Ralph Griswold's series on line-based patterns, covering patterns built by repeatedly shifting a basis line by a fixed amount. It explains which shifts give distinct square n×n patterns (omitting shift 1, which gives twill, and shifts above (n-1)/2, which are design-equivalent). Tables give the usable shifts and the number of shift patterns for n up to 16. The last page shows example patterns as black-and-white grids.