I put two sets of fairy lights behind the machine to give the cave more light. I also put one set half inside the machine so that I could use one of the bulbs to light the machine lights. I had to move the bulb from colour to colour when needed.
I put some more yellow sprayed wire wool around the base of The Machine to tie it into the cave and to hide some of the cracks that were leaking light.
The front panel of the machine tones in brilliantly with the orange or the cave...
...and the parts to the machine are nice and atmospheric sitting at the top in the darkness of the roof of the cave.