A web document by Ralph Griswold that uses the Painter weaving language to analyze a shadow weave threading. It breaks the threading into anchors for domain runs joined by palindromes, then represents this structure with pattern forms and sequence notation. It defines coupled, anchor and palindrome transformations, tries all 5,040 anchor-sequence permutations, and shows example weave images. It concludes that the design is aesthetically robust and that further variations will be explored in a later report.