First, how to create the design itself? I think I found the original pattern, a twill pattern with elements of a Crackle threading, on Handweaving.net. Can't remember, exactly, because it could also have been on Pinterest. Both are great places to scan weaving drafts for ideas. Here's what the original draft looks like.
As for Rep (below): Well, not so great, but I think it was partly owing to my choice of wefts, where I alternated 20/2 cotton (thin weft) and black rayon chenille (thick weft). I think this sample would have been better if I changed my sett, making it much denser, and chose something thicker and less textured than the chenille for the thicker weft. Nevertheless, I see some potential here!