STEP-BY-STEP SWISS DARNING
Swiss darning or duplicate stitch is a great way to add small details to your knitting, covering the stitch with an embroidery stitch the same shape as the stitch beneath it.
Work from bottom to top, bringing the needle out at the base of the stitch at 1 . Take the needle behind the top of the ‘V’, in at 2 and out at 3 . Take the needle down at 1 and bring it up at 4 , at the base of the stitch above. Continue in this way up the line of knitted stitches.