I purchased a set of road bars for my Rodriguez and decided to add a little harlequin accent to the bar tops. A few folks have asked about this type of wrap so I decided to take some photos of the way I do it. Whether I'm doing a harlequin or a regular wrap, I always use cotton tape and always start near the stem and work toward the bar ends. With cotton tape pulled tight, this has always worked well. I've also worked out my own way to start the wrap that never loosens and does not require tape at either end.
Here it goes:
Edit: Now that I see how it was thumbnailed, start at the top row, left image.... oh well they're numbered.