Originally Posted by BMP

7 across -7 down.
BBCCCBB
BCRCRCB
CRCBCRC
CCBBBCC
CRCBCRC
BCRCRCB
BBCCCBB

B=background
C=greens
R=red
I worked out on graph paper 2 shades of green and a red which I placed in between the greens
I had 1/3 yd. of each green (2 shades)
1/3 yd. of red
1 yrd of background, boarder
This made the entire fabric grid
I will need to get more fabric to finish the back and binding and boaders if I think it will need any after.
I dont have the background boarders on yet but the grid (sewn together) is 39" square. I am adding 4 inches for the boarder but you may be able to get away with 3, I just wanted to be safe.
I also altered the template and made the "X" 1 inch from the corners.
I was able to get the plexiglass at the hardware store for 52-cents. I used a sharpie to mark my lines.