Feather stitch

This stitch is done using three lines or four parallel lines. 

I have used three lines here. 

The thread is fixed on the leftmost line. 

The first stitch is done by putting the needle at the same point on the middle line. 

The thread is kept in front of the needle. 

The needle is brought out at a lower point on the middle line. 

We get a U shaped stitch. 

For the next stitch put the needle on the right side line at the same point where the first stitch ended. 

The second stitch is done when the needle is brought out at a lower point on  the middle line. 

This way we work from left to centre and right to centre getting a full line of stitches. 

You can use your imagination to beautify it further. 

I have spaced the lines away from  each other for clarity, but this stitch will look better if the lines are closer to each other. 

This is another variation with three lines. 

In this variation the first stitch is done at a point on the second line similar to the

 the starting point   where the thread is fixed. 

The needle is brought out at a point lower than the starting point in between the two lines. 

The next stitch is started by putting the needle  into the cloth at the midpoint and brought out at the upper point of the second line. 

The next stitch is done by putting the needle into the same point on the third line and brought out at a lower point in between the third and second lines. 

The third stitch is done by using the midpoint of the two stitches and brought out at a lower point on the second line. 

This is how it will look when done.

I have tried to use Feather stitch in this neckline with herringbone stitch.