for each se of 4 patches in a 2" border:
cut two squares 2-7/8" x 2-7/8"'
cut the squares in half diagonally
cut a light square 3-1/4" x 3-1/4"
cut a dark square 3-1/4" x 3-1/4"
stack the two squares so one is exactly on top of the other
place them right sides together
cut them into four pieces diagonally
sew the pairs together along one of the short sides
make sure to always keep the same color on top
make sure to keep the points facing in the same direction as you put them through the machine.
open up the stitched pairs so that the dark fabric is to the right
match the QST to an HST and stitch carefully along the diagonal
open it up and there is your patch.