You'll need one of these styrofoam circles from the craft store. They even have heart-shaped ones if you're feeling really festive. I had 2 kinds of fabric so it would have some detail, but the lighter paisley one frayed too much. I just had to stick with the red polka-dotted one.
You'll need to lay a foundation to prevent peeks of the ugly green foam from showing through your fabric pieces. I used some scrap ribbon and also pieces of the fabric I was using to do this. I secured it with my glue gun.
I decided to make each piece about 1 inch wide and 12 inches long. Do you see my makeshift cutting board? I don't have one of those self-healing mats [read: YET] so I decided to make one from a cake board. It was a dumb idea. I ended up just cutting on the table and it was fine. I'm just trying to save you from the same mistake.
Once you have your fabric strips cut [I used way more than this], you're ready to begin!
Here's a closeup of the side. I added pieces of ribbon to break up the monotony of the fabric.
I think it would look better if the fabric was colored on both sides. Oh well; if at first you don't succeed, tie, tie again! Ok, that was corny.
I hot glued a piece of strong ribbon to the back and made a loop to hang it with. It looks great on our bedroom door! I hope this inspires you to give your house a little winter pick-me-up.