Light circuit for RC car
It seems your calculation are wrong.

To calculate the resistor for the LED you should do:

(VCC - Vled) / Iled.

With the max brightness and the lower diode limit you should use (rounded to E12 serie):




white                     150 ohm
red                       220 ohm
green                     220 ohm


For blinking the LED, you have tons of possible way, MCU is probably what will give you most of the freedom.

A good and simple way to start is to use an Arduino which is made for people to learn easily.