This is a chart for a celtic knot cable which can be used with hexipuffs from the Beekeeper's Quilt pattern by Tiny Owl Knits. This pattern does not give instructions on how to make a hexipuff, it just has the chart for the cable. The equivalent purl increases and decreases should be used, instead of the ones given in the pattern.
Please click on the above chart to enlarge it, and then right click on it and choose save image to save it to your computer. Alternatively, a PDF copy of this chart can be found here