I started this insert for the Shadow Quilt back by cutting 2 1/2″ strips of the fabrics used on the top and sewing two strips together. At that point I wasn’t sure what I would do with the double strips. I ended up cutting equilateral triangles, sewing pairs into diamonds, then compiling four diamonds into a larger one.

This large diamond gave me 9″ for the start of what I intend to be a 14″ strip.

I aligned five large diamonds end to end: 75″ – long enough for the quilt back but I wanted to fill in where the points touched. I added single small diamonds on each side in the space. That still left ten half-diamonds needed on each side. The easiest way to figure out the dimensions for these half-diamonds was to place a sheet of paper beneath the diamond layout and draw in the missing half-diamond (I added a 1/4″ to each angled side to be sure there would be adequate seam allowances).

I did the same for the 1/4 diamonds needed to complete the ends as well.

Now diamonds are pieced in diagonal lines. Because I was improvising as I went along, I already had the large 4-part diamonds sewn which complicated the process somewhat. In the end I laid out the pieces and assembled the strip section by section.

Width so far: 9 1/4″ – so I’ve cut strips for each side:

The borders: 1″ red, 1/2″ dark grey, 2 1/2″ light grey on the outside. The strip will be inserted into the darker grey fabric with vertical pale lines and dots.

I’ll add the borders tomorrow.