Cut along the line, then press open and trim to measure 2 3/4" square.
Make a total of 4 red HSTs. Then, make a total of 12 blue HSTs.
Step 2. Referring to the next 4 photos, sew together the HSTs to assemble the block. Pressing: Alternate the direction of the seams for each row, e.g. one row all seams to the left, next row all seams to the right.