I am hopeful for a schematic to build an intermittant blinking tail-light like I once had about twenty years ago. This small, sealed, very few components circuit/gadget had only three wires which were used to connect to: Ground wire, Tail-light wire and Brake-light wire. (*Standard 12 volt system.) Once each four seconds, it pulsed a (6)Six-VOLT AUTOMOTIVE BULB to make it "Flash". When the brakes were applied, it would Flash rapidly. This attention getter was helpful for safety on my M/C.