Hello friends !

I´ve mad a simple car-body (half).

And now I want to know how I can make a light in the front and side of the car. I mean, the details of a car are very important - so, as example the lights.

I don´t know how I can make grooves & columns between the lights and the hood.

I´ve tried to extrude faces, but that seems to be the wrong way.
Who can help me ?

Which tool I shopuld use for that ?
Does anybody know a simple tutorial ?
or some links where I can read more about that problem ?

the full file is here to download: 41kb .rar file
https://rieder.tophunter.at/3dproblems/car_problem1.rar




thank you for every help,
bernhard