The Missouri Star Easy Cathedral Window tutorial is, in fact, easy. That is until you need to figure out exactly how many squares are needed for the base, the windows, and the clever curves. I originally wanted to make the runner 30" x 84" so that it would be a layout of 10 squares x 28 squares, with 3" finished squares, but then realized that I didn't have enough fabric. Hmmmm.... maybe I could reduce the layout to 9 x 28... but no, I needed to stick with even numbers since the blocks are made with 4 patches. That's how I settled on an 8 x 28 layout. Whew. Now that I had that figured out, how many squares does that really mean? There are the bottom squares that make the foundation, all those background squares that are folded in half that will eventually make the curves, and then there are window squares that overlay at all the intersections! It was enough to give me a headache.
The only way I was going to figure it all out was to put pencil to graph paper so I could visually count everything up.
As you can see in the photo above, there are lots of things crossed out, and my rendering was my original layout of 10 x 28 (even though it's written correctly). After lots of head scratching and counting of fingers and toes, I've come up with this:
Bottom Foundation Colored Squares = 224
Top Window Colored Squares = 95
Background Cathedral Curves Squares = 380
Since I'm using 6 different colors I'll only need 53 squares of each color (+1). No problem there. But those background squares (some of which I've already pressed into cute little triangles)... I've come up short. Thanks to all this quilty math I now know that I need to purchase another yard and a half of Bella snow. I guess it makes the headache worth it. Better a headache now than tears later.