title: Algorithm for distributing points evenly but randomly in a rectangle
body: <p>I want to place some points in a rectangle randomly.</p>
  <p>Generating random x, y coordinates it's not a good idea, because many times happens that the points are mainly distributed on the same area instead cover the whole rectangle.</p>
  <p>I don't need an algorithm incredibly fast or the best cover position, just something that could run in a simple game that generate random (x, y) that cover almost the whole rectangle.</p>
  <p>In my particular case I'm trying to generate a simple sky, so the idea is to place almost 40/50 stars in the sky rectangle.</p>
  <p>Could someone point me some common algorithm to do that?</p>