Bob Mitchell from First Church of the Nazarene in Eugene, Oregon brings us this great design that’s easy and inexpensive.
The panels were a standard Natural color Coroplast. They attached squares together to form the towers using 2-inch electrical tape (works better than duct tape).
Then the grids were simply more Coroplast hung with large black paper clips. They bent the clips to form their own hooks.
Add color LEDs or gelled pars and you end up with an interesting, geometric background.