Here is an idear...
Draw lines and quilt through your small blocks in the 4 up section of the top... green through green, white through white on the diagonal. If you draw them correctly, you should have a diamond shape in the middle of all those 4 inch blocks.
Hmmm that might not make sense... Draw a line from the midpoint of each side of the large blocks to the midpoint of the next side of the big block. You should have a diamond shape. Now extend those lines. It should go through the corners of the small blocks in one direction. Your overall pattern will be lots of diagonal crossed lines with nice sized diamonds in the middle of those large blocks.
Understand, or am I being thick as mud?
tim in san jose