Zig Zag Path Block Tutorial

I select quilt blocks and color palettes for the charity quilts that the Knoxville Modern Quilt Guild makes as a group, and I chose this traditional Zig Zag Path block for our next group quilt. I found a tutorial online already, but it was short on details and didn't give much room for error in the HSTs, so I've created a new tutorial here. The block is 12.5 inches unfinished.

Cutting List

Background (gray in photo)

• Three 5-x-5" squares

Color A (dark in photo)

• Two 5-x-5" squares
• One 4.5" square (set this aside until the final assembly)

Color B (light in photo)

• Three 5-x-5" squares

Piecing

1. Draw a diagonal line from one corner to the other on the 3 background squares and 1 Color A square. 
2. Pair up the squares as follows:
• two gray + two Color B
• one gray + one Color A
• one Color A + one Color B
3. Sew 1/4" away from both sides of the diagonal line on each block pair.
4. Cut on the line and press toward the darker fabric. You should have 8 half-square triangles.
5. Trim each HST to 4.5-x-4.5".
6. Arrange the HSTs and the remaining Color A square according to the photo above.
7. Assemble blocks into rows, pressing the seams in opposite directions on each row so that they will nest together.
8. Sew the rows together, and press seams open.
9. The block should be 12.5-x-12.5".

Multiple blocks arranged together create a spiraling effect.