This is the 25th week stitch of the stitch challenge TAST2010 by Sharon.B.
Iam sharing the variations I have tried of this stitch-
1a.this row I learnt how to work this stitch.
1b.the  stitches worked  are quite long.
1c the  stitches are short and the thread used is thick in this row.

vandyke stitch-1a,1b,1c