What's black & white & red all over? - Sashed Disappearing 9Patch

So I got this wild hair to make a black, white and red quilt somewhere around twin size for my loveseat. It gets cold in my house in the winter because it's not well insulated AND it's a raised foundation house.

I picked/stashed this fabric because I thought it'd make a good spiderweb. I didn't much care for that. *sigh* So, back to my inspiration...

My bathroom is black & white with red walls. My living room is sand walls with black trim. I kinda wanted to blend it together a bit. Not much, just a bit. Besides, I think the colors of the quilt will suit me. So this is what I decided to do... a disappearing 9 patch block that, instead of just being rotated and re-sewn, is sashed between the pieces. This block measures 18 inches unfinished, so 17 1/2 inches finished. However, each block will be sashed between blocks, not just between pieces.

I will only be doing a block or two a month of these. I just don't have enough time to do everything I want to do... LOL.