bkay, if I'm getting it correctly from your description and the picture is that if you start in that upper corner with the triangle and then full block, then the next block down is a 4-patch? That would be one way, anyway, to piece it but would be squares and not rectangles.
It would be easy to set up in EQ but unfortunately I've just taken down my system with it getting ready for a house guest. Could even draw it out on graph paper but that won't help so much with yardage.
Although you will be piecing the blocks on the diagonal, I would probably find it easier myself to layout the colors in the horizontal rows first and then combine them into the blocks -- if that makes sense.