Alright I threw this together to show various to-the-stripe pleating options based on a 12 inch sett size with Robertson Hunting.

You're going to burn up too much cloth pleating to the white lines, being 12 inches apart.

Going with things that repeat every six inches you have:

1) pleating to the red lines

2) pleating to green blocks

3) pleating to blue blocks

4) pleating to black blocks (not shown)