I worked out this draft for a rigid heddle loom with four heddles based on the general waffle weave instructions in Sharon Alderman's Mastering Weave Structures. After figuring out how to do it on four heddles, threaded to create the equivalent of 5 shafts, I went in search of the same draft for a regular loom. You can find that draft on the handweaving.net website. It's Draft #59453 from Posselt's Textile Journal, July 1913, p.2, figure 6.