Zooming in into the pattern, we can see that the broadened lines are built up by connecting square[br]and triangle units together. These bear a geometric pattern of 4-fold symmetry[br](like the main pattern) we can reconstruct by an underlying pattern of blue[br]octagons, green squares and purple irregular pentagons on which the method of[br]constructing line patterns is applied.[br]

A similar pattern Peter Cromwell finds on the shrine van sheik Ahmed-i Jan in Turbat-i Jan (1614). He draws it in his article [url=https://www.nexusjournal.com/volume-18/volume-18-number-1-2016.html]Nexus Journal[/url] in 2016. The patroon uses the same forms and in it the broadened the broadened lines too are built up with squares, triangles and octagons. By rotating the squares by 45° the result is a pattern similar to the previous one, but just slightly different.