A simple yet beautiful running stitch variation...
Step 1 – Work two rows of aligned running stitches as shown.
Step 2 – Bring the needle and thread up close to the first stitch of the bottom row.
Step 3 – Pass the needle under the first running stitch as shown.
Step 4 – Pull the needle and pass it under first stitches of both the rows from top as shown
Step 5 – Repeat steps 3 and 4 until end.