Thanks Amandasgramma and Jerry for the idea on quilting log cabins. I like the way the beginning centre block is done, I would never have thought of that. I am a grandma, have taken up quilting again, but sewing straight lines quilting on a cot border was beyond me.
I was nervous about the water soluble fabric marking pens I've had for years, I tested some hoping they would also be "air soluble" by disappearing overnight, but those pen marks were still on the test piece of material three days later. I was too nervous to use any marking pen by now. I was stumped. I seized a roll of masking tape out of the drawer, laid it down on the quilt border where I wanted those straight lines, sewed along the edge of the tape (it was the right width) with the walking foot, giving lovely straight lines. By the way, I have never been able to sew straight.
I enjoy the tips in this forum.
Anna