Blocks sewn together....waiting for border choices...

I finished the baking, cleaning and then sewed the blocks together into a top.  I will add 2 borders.  Our school colors are orange and black so I have seen this combination for 52 years living in this town.  This is a soft orange and quite pretty.  The diagonal layout is automatic if you place the 3 center squares in the same sequence (small-medium-large) and repeat it.  Then the next row the small is moved one spot to the right (offset by one block) and it will automatically create a diagonal layout.  My secondary pattern is the black and white alternating so I had to have 7 black and 7 white for each size center square.  Did I ever mention I love math?