How to deal with four year old lier?

My daughter just turned four and she is just a lier and I try and explain what a lie is and give her examples but I am not sure if she is getting it. My dad said when you were little if I caught you lying I would you and you learned but I am not to much of a er only when I have tried everything else and she has not recived but one and that was for running outin the street. I don't want to her if she has no idea what she has done wrong but I know she lies and alot my boys where never this hard and when I did the example thing they got it but she is so much harder any suggestions?