Cut 4 strips each that are 2-1/2″ wide of the light and dark blue. Sew them together to make strip sets. Cut into 80 1-1/2″ segments.
Cut 80 1-1/2″ x 4-1/2 yellow rectangles and sew these to the top of the above segments.
Sew these strips to the pinwheels from Step 4. Make 20.