After you sew you strips together into one big tube, you cut the tube into strips and end up with many skinny tubes. You can hang the tubes over something like a yardstick or pin them to your design board. Now you 'rotate' each tube to create your flowing pattern.
This is where you try it with the seams lined up or staggered. When you like it, cut the top of each tube. You will have strips to be sewn together.
Your design decision.