The warp alternates 2 threading blocks with 3 thread colors. This is a two shuttle weave and each block of the 2-block treadling uses two colors in the weft, and the color combination changes with each block change. All 3 of the warp colors are...

Tip: Use a temple. Note that the draft shows only four stripes of the 16 I used in the towel. I basically flopped the draft several times. This resulted in two wide green stripes on the sides and one wide purple stripe in the center....