I want to implement OAuth/OpenID for Website One and use it in Website Two.
I create Sign Up, Sign In, Sign Out, Profile functionality/Pages for Website One and want to use authentication in Website Two like Facebook or Twitter authentication.
As an additional information if you got interest you can visit trial websites of Website One and Website Two. Please do not expect full or correct functionality because as I said above they are just trials yet.
P.S. I decided to use OAuth. Forget about OpenID.