If you have not found the website for the pattern,
I was searching this board for the same thing, thinking that
I had seen it here. So anyway, the link to the pattern:
She calls them: Tuxedo Tiles.
Http://moosestashquilting.
blogspot.com If you go to the sidebar to the tutorial
section, Tiles. Hope that this what you were looking for,
took me a bit and a lot of different searches to finally retrace my steps to find my way back to this site. Enjoy!