Ok so i have a "Christmas Tree" drag race light setup that consists of 4 incandescent, 12V lamps. The top 3 lamps are amber, and the one bottom green. Currently it is hooked up as seen in the picture. I know some about electronics, but I am still somewhat new to them. What i need is a circuit that will at the push of a button, turn on the top amber light, then turn the second amber light on .5 second later, then the next amber light .5 second later, and then the green light .5 second after that. When a light comes on the previous light should be off, and i would like the green light to stay on for 5 seconds, but if it is much simpler to have it only on for .5 second that is okay. I have read that this sort of thing can be done with 4 555 timers, 2 556 timers, or a 558 timer. I have several 555's and lots of resistors and capacitors available, so if i dont need to buy anything i would rather not. I would like the timer to run off the 12V DC battery if possible. Thanks alot for the help.