Create Database cloning of existing database

Question

I'm a newcomer into the .net world, right now I'm working on Entity Framework code  first approach.

 

I used migrations on single database, which worked fine,.but, what I should I do if I want to make database cloning of my default database, and if I added some column in my default database  it should automatically added into other databases also, I searched everywhere but I didn't find what I was expected. Please Help me..