Starting from one short end of the paper, fold the strip back-and-forth, making each fold roughly 1.25 inches (3.175 cm) wide.
Fold the strips back and forth longways like an accordion to make six squiggly worm shapes.
Sometimes he says things to Marie-Thérèse and sometimes he simply thinks things to himself, but it all runs together into a Möbius strip looping back and forth between the present and the past, as he broods over his current difficulties and laments long-ago events.
A few times a week we get to go outside onto a caged concrete strip and walk back and forth for an hour.
The back-and-forth continues for weeks.
There is back-and-forth on this.
It's a back-and-forth conversation.
"It is one rare medium that allows readers to have a bird's-eye view on several strips and flow back and forth in time.
Peter and I were about to find out just how difficult the fishing was: We stripped woolly buggers back and forth through the deep holes.
The interviewer marked off the area with measuring tapes and the surface was vacuumed in 3-inch strips, making four passes back and forth on each strip.
