How to move/transfer database from Sql Server 2012 to 2008 R2,2008,2010

I will explained about how to restore/move/transfer entire database from Sql Server 2012 to Sql Server 2008 R2, Sql Server 2008 and Sql Server 2010.
Steps to Transfer:

Right click on your Database
Choose Tasks option. choose scripts
Click on next  -> next choose Advanced tab