Put copyrights in all of your code, I mean everything. Copyright assignment is the act of assigning your work to someone else, usually in the form of a contract

Put copyrights in all of your code, I mean everything. Copyright assignment is the act of assigning your work to someone else, usually in the form of a contract job. Until a contract is signed, and you have "assigned your copyright" to another entity, all of your produced code remains under your own control.