i am trying to install a red blinking LED in my car. I want it to blink when the car is off and turn off when the car is running. I bought a 5 volt DC 20mA 5mm blinking LED. someone also told me to buy a 1/4 watt 1k ohm 5% tolerance resistor. will this blow of i isntall it in the car that operates at 12v? what do i need to do so it dosent? i also noticed that when i hooked up the LED to a 9volt battery it blinks faster than i would like. how do i slow down the rate at which it blinks? i am new to this knd of stuff so please explain clearly. i am good at working and installing electronics that are already built such as car stereos and speakers, but i have never actually built anything out of scratch that is electric.