Step 1: Materials Used
1 or more cans of spray foam insulation
1 or more orange string lights
plastic floor liner
1 roll clear packing tape
1 can of Grey primer spray paint
1 can black spray paint
1 can red spray paint
1 can rubberized undercoating
Step 2: Preparing the lights
You can also use larger bottles by slicing down the side as well and rolling them up to the desired size.
Run your string lights through these bottles. Perfection isn't required and some lights outside the bottles is ok, just try to to have most of them inside.
Alternatively you can use clear plastic sheeting such as plastic drop cloth available in your local hardware stores painting section.
I used both methods in the above example.
If using plastic, roll it up around the lights and tape in place with the packaging tape.
Form a circle with the lights as best you can and curl the end into the center of the circle.
Use the packing tape to hold everything in place.
Step 3: Spray foam insulation onto lights
While it's dying you can tap at it with the foam cans tip to roughen up the texture. Be careful this crap gets everywhere if your not carefull.
You can also add bits of wood or charcoal to the foam at this time before it dries.