The LSAT has six sections. The last of those sections is often ignored, but since you’ll have to deal with it on test day, we’re going to talk about it today.
The writing sample always comes at the end of the LSAT, after all five multiple-choice sections. The proctors will collect your test booklets and answer sheets, then pass out the writing sample topic and the sheet on which you’ll write your essay. You’ll have 35 minutes to plan your essay and write.
The writing sample isn’t scored, but law schools will see it. It isn’t likely that your writing sample will play a big role in whether you get in, as long as you follow directions. It would look really bad if you were to blow off the writing sample entirely, or doodle pictures instead. Writing Twilight fan fiction probably isn’t the best idea either.