My quick way for one-sided pattern bunting is;
- use a paper template and cut neat triangles from plain linen or lining fabric
- pin these to the patterned fabric
- sew 1cm from the edges
- trim it neat and close to the stitching. I like the raw edges on large bunting.
- fold some 2cm wide tape/ribbon in half and iron it
- machine stitch the pennants within the tape