Here is a square tablecloth hung over a rod to be used as a window treatment. I used a vintage pin to embellish the center.
The backside if this treatment has a safety pin to secure where I pinched the fabric in the center. After, I had it looking the way I wanted, I added the flower pin on the front side.
Here I gathered up the sides, like folding a paper fan, and secured it with safety pins. Then I dug through my jewelry box for this look.