I have two pull chains fixtures in a room. The wire comes from the breaker box to a pull chain light to a second pull chain light. I would like to just keep the pull chains, but add a switch on the wall (the pull chains would just be on all the time but run by the switch). The door opens right by the second light (end of the line). Can anyone help me with a way to wire this easily? Step by step? I would appreciate it.