How do I make electrical circuit?

Hi,

this is just an idea, but is there any way to do a electrical circuit? Biggest problem is even on the start, when you want to light up the light bulb. Because you need to compare if light bulb is connected by cords to the battery. Any way to compare that? Because it is really interesting theme for me. Thanks for every answer!

I tried and I did a thing who doesn't work at 100% .. But maybe it will help you.

sirvoid.vv.si/Electricitytest.capx

I would try it with - object is overlapping (and create invisible object if e.g. switch is closed)

Or you could even do a pathfinding thing