I followed instructions from this site. I used 2 coordinating fabrics instead of one and added the embellishment at the top. It was actually a piece of scrap embroidery that was in my Great-Grandma's sewing stuff I inherited. (The box of stuff I got from her was mostly pins, a few buttons/needles, old elastic, and scraps of lace and bias tape leftover from projects she made.)
I put shorts with it because it turned out a little shorter than anticipated but still so cute. My button hole was pretty crummy but that's because of my machine. I bought it used over 10 years ago for $100 and it's been a great little machine - but it does not like buttonholes.