half of a heart. at the bottom of the middle column, place the top half of a heart.
you will notice when you do this, that the middle column is one strip longer than the outside columns. take the top left and top right blocks of these outer columns and sew your last two 18.5″ strips to the top of them, as you see below.
having done this, sew the columns into strips. *at this point, i ironed the blocks, ironing each strip in the outer columns down, then ironing each strip in the middle column facing up. doing this allowed me to nest every row together as i sewed the columns 