I found some pictures of these party decorations on the internet and decided to try making some. They turned out great!
Fold the paper portrait style (bottom to top) into an accordion.
Fold (closed accordion) in half and staple the ends together.
Make another and line them up flat sides together. Staple the flat ends together. Make sure to trim off any “extra” folds before stapling the two pieces together.
I hung mine with string and tape.