Question Concerning Rear Turn Signals and Brake Lights

When I rewired the blue car, I used the reverse lights as my turn signals with amber bulbs. it really simplified it as far as I was concerned. Cause I didn't use a kit, I wired it from scratch with spools of wire and a terminal supply catalogue. So I was literally starting from scratch. But I didn't have a factory ignition switch or turn switch. There's my reasoning. Lol. Eric L