Making your Block
First, let’s create your pinwheel block with (4) Half Square Triangles (HST). You can refer to my magic 8 blog (click here) to achieve 8 HSTs at a time. Lay out your (4) HSTs to form a pinwheel. Make sure that your triangles are pointing in opposite directions, sew in pairs, and then the pairs together completing your block. Press the seams the best you can.
Gently pull/tug on the center of your pinwheel seam to open the seam up.
Until then, may your bobbins always be full.