Kitchen or anywhere DIY. Seems simple enough, depending on your gap between shelves, anywhere from ropes to ropes for your spacing. You could even use wider wood, just adjust your rope length to accommodate your width and height of your shelves.
I think I'd do mine on a painted board but I love this idea! Make a stenciled barn-wood valance! Turn a sign made from old barn wood and stenciled with happy song lyrics into a nontraditional window treatment.