this site. It didn't come with a tutorial so I made up a tutorial using all the skills I've learned while quilting with 12squared!! : )
Using two 8 1/2 by 11 pieces of white paper, cut four 5x7 rectangles. On two of the rectangles, draw a diagonal from the left upper corner to the bottom right corner. For the other two, draw a diagonal line from the upper right corner to the bottom left, as shown.
You will need three strips of fabric with a print for each side of each rectangle.
Place a piece of fabric right-side down on the white fabric, lining up the edges. Sew with 1/4" seam then iron open. Add two more strips on that side the same way then add three strips on the other side.
(You'll notice that on my example there are more than 3 strips on some sides. Please ignore that and stick to three. I realized later that the finished blocks look much better with fewer strips.)
Now sew them together. No need to trim.