Built from snow and ice.
Sorry about the night I no longer have the world in can not help it.
just shovel a little snow and then build everything together to an igloo ^^ the ICE serves as a window so I advise NOT to take pack ice because it is not s odurchlaessig.
The door mechanism requires 4 pistons of redstone flares and some redstone.
On request I will rebuild the igloo door system and post here so you know it too =)