How to build second floor?

So recently i started constructing my house, i built first floor freely, but now i dunno what to do… i put pillars and walls up there… but i dunno what to do now. Help.

Heres picture of my houses current statement:

http://www.picz.ge/img/s2/1402/26/2/2c3058b3b638.jpg

Please explain to me what to do now :3.

Add a ladder and a CEILING panel.

Ceilings on the first floor at the floors of the second floor. So you put a ceiling up to make another floor. Just don’t put it over your stairs!

ceilings are floors

Ok thanks for answer i gotta go now i will reply tomorrow and tell you guys how it goes.

You don’t have to do that.
Just put in your ceilings.