This started off with me wanting to make a fireplace that could be an entrance to something but also relight whenever it closes. So far I've just used glowstone as a replacement for real fire and it was pissing me off.

It turned into a little house thing, but you can replace almost any of this with other blocks and hide it in tons of places.

When you go through the hidden painting door, it activates an RS-NOR latch that opens the fireplace and puts the fire out. After going through the entrance there is a pressure plate that resets the fireplace door, and then sends two pulses to a piston/dispenser rig that opens up and throws fire charges towards the netherrack.

I made it send two pulses because I found with one it would often just light one side of the fireplace, even only being a very short distance away. After testing it seems to light both sides 9/10, I really wish there was some way to make them shoot perfectly straight but oh well.