Rainbow Scrap Challenge Sampler - 36 Patch

I totally cheated on this block.  I have a bin of nine patches made from 1.5 inch strips hanging out in my closet waiting to be turned into a quilt.  I dug though looking for blue nine patches and came up with these four.  

Notice that two of the nine patches have dark corners and two of them have light corners.

In case you don't have a bin of ready made nine patches, I'll do the math so you can make your nine patches from scratch.  You will need three blue strips and three white strips.  Each will need to be at least 9 inches long.  Make one strip set that has two blues and white in the middle and one that has two white strips with a blue in the middle.  Press toward the dark and sub cut into 1.5 inch sections.  Use smaller strip sets for more color variety or sew individual 1.5 inch squares together if you prefer.

Sew the four nine patches together so that the white and blue squares alternate.  Your unfinished block will be 6.5 inches.