Hope I can explain this so everyone can understand.
Muslin is 7 inch square and windows are 2 inch trimed down later.
I use a 6 inch cardboard to press seam allowances
2 sides first then the other 2 remove cardboard
fold in half - right side together - stitch from outer edge to center on both ends I use an air erase marker to dot the center
when both ends are sewn turn right side out
stitch from center half way out on both sides again I use an air erase marker to mark the center I work from the center out because that is how I was taught to do it.
fold opposite corner points to center and stitch together
then one at a time the 2 remaining corners, when all corners are sewn together tack through the center to keep in place.
You must decide which side of the square you want to be the back of your quilt. One ways show all your tiny stitches the other way is plain. I went for the stitches - figured if I was going to do all those tiny stitches I wanted them to show.
now you need to attach 2 squares together. Bach sides of quilt together I do the tiny stitches again but this will be covered by the colored window fabric.
trim colored fabric to fit just inside that center square. pinch two sides up at corner and stitch then continue down each side folding muslin over window and stitching down. Do not go all the way through to the back.
2 points of the square will be free, the other 2 will not as that is where the 2 squares are sewn together
6 finished squares ready to be added to quilt (above) the back of those 6 squares
6 squares added to quilt - I just can not blindly stick my hand into the window pile and use it - I pick and choose but on ly here there is not a great master plan for color
next set of six ready to go Hope this is clear. Sorry for the color difference in the pictures they were taken in different rooms.
back of quilt