I bought this embossing folder ages ago (really, ages!) and this is the first time I've used it as I could never think what to do with it, but it seemed to fit well with this idea.
Here's how I made the fence..
2. Mark the strips at 2cm from the top and 2cm from the bottom and cut 2 log narrow strips to join the fence panels together.
4. Add the long pieces in a straight line across the foam squares and trim off the excess.