Self building/self repairing 3 story building

Howdy again Ya'll!!

So i had seen videos of ppls self building constructor. I had never seen a tutorial about how they are made. so figured i'de try and make one. Sadly it was mighty easy to do. I guess cause i've been making stuff long enough that i understand all the principles behind it now. heres a vid of my finished build, and i'll upload my tutorial vid in a few days.
Mine has been designed to have 3 floors, all self building self repairing. of course you'll have to turn it off and add in stairs and stuff on your own, trying to do it while on doesnt work out so well lolol.

Enjoy Ya'll!!