To tie a Carrick Mat Start with a clockwise bight, to layover with an open pretzel. Run your working end under your standing end. This will bring you to the left side of the flat knot. Run the working end in a sewing fashion. (Over, under, over, under) This will bring you near to your standing end. Run your working end next to the standing end, following it through the knot. Repeat as necessary. This article is a stub. You can help Wikipedia by fixing it.