If you need instructions on two-layer-warping (2LW), please see instructions in the posts linked below. The first post tells how to warp the loom and weave Row 1. The second post shows the needle path (where to enter and exit the loom) for the first eight rows of a 2LW pattern. For this pattern, follow the diagram below, but follow the needle path instructions; they are universal for all 2LW patterns.
2LW Part 1
2LW Part 2
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“Concentric Diamonds” does not begin nor end with a plain weave row—rather daring, I thought, but it works!