cut as many 2" equilateral triangles as you can from the scraps.
putting right sides together, stitch down and up the 'v' leaving the top open (top being the base of an upside down triangle).
Snip the point off and turn right side out.
Tricky part is to pin all the triangles in the bias binding.
Once pinned carefully machine stitch along the bias tape, making sure the triangles remain sandwiched between the tape.