Print or trace the block diagram onto foundation paper, number, and cut out as below.
Foundation piece each numbered section. Note that I had to rearrange the sections a little to resemble the block diagram. If I'd wanted it simpler I should have mirrored the diagram but this worked as well. Just make sure to refer to the block diagram when you lay out your sections.
Out of background fabric, cut
two rectangles 1 1/4" x 3 1/2"
two rectangles 1 1/4" x 5"
Sew the three center sections together.
Sew the three rectangular pieced center sections together.
Attach the shorter background fabric rectangles to the sides and the longer ones to the top and bottom of the center section.
Applique the four small triangles into position. My applique techniques still leave a lot to be desired, that's for sure.