Almost 20 years since I took Electronics in night school. I have a 12V circuit with two lights and two switches. I want: - S1 to light up L1. - S2 to light up both L1 AND L2. How can I do this? (In case it comes up, I do NOT want to run a second wire to one of the lights (like you might do in a three-way circuit) because the lights are distant and inaccessible.) Here is some context in case it helps: My boat runs off a car battery. I have 1] running lights and 2] a masthead-mounted anchor light that doubles as a steaming light (which is one of several running lights). One switch will turn on the anchor light ONLY. Another switch will turn on running lights which INCLUDES the anchor/steaming light. I do not want to have to turn on two switches to get my running lights going.