How to do the car, i still dont understanding,can send some website useful to me
Did you try to google this?
You have given us almost nothing. Rather than us guessing what you are trying to do, you need to tell us more. What are you trying to do?
"do the car" is not enough. Is this a homework assignment to make a car move? Is it a hobby thing where you already have a 4wd car and you want to try arduino control? Is this and actual real car and you want to put in some arduino control?