If you are quilting this design with All-Over Quilting style, you’ll stitch the straight lines all the way across from edge to edge, then fill in each quarter square with echoing lines.
It might sound crazy, but I actually think walking foot quilting on a stationary home sewing machine would be the best choice if you wish to quilt this Four Square design like that.
Walking foot quilting will not be very fast, mind you, but it will help the layers feed evenly and it will be easy to stitch the straight lines across your whole
quilt.
I mentioned the Jelly Town Baby Quilt in the video. As you can see this was quilted with Super Spiral but it could just as easily be quilted with Four Square as an All-Over quilting design.