Rocky, I think the black stripes that Barb was saying are not pivots are those that have blue on one side and green on the other. (ie: the black stripes between the letter A and B in the image she posted).

The black stripes you're referring to are those that Barb was referring to as blue lines (Those that lie *on* the letters A and B in the image.) I assume Barb was referring to them as blue as the blue is more dominant.

So yeah, those black stripes (inside the blue) you're referring to are pivots.