Pick a bolt, tap a patch. Every patch can be worked out — you never have to guess.

• A finished patch wears a muslin tag: one stitch per seam, in the fabric on the other side of that seam.
• Block edges get no stitch. A bar showing two fabrics gets one stitch each.
• The tag says how many of each fabric touch — never which seam is which.
• Every fabric has its own stitch as well as its own colour. Both are printed on its bolt.
• The bolts count patches still to dye; the left rail tallies each row.

Tap a finished patch to light up exactly what its tag counts.