attractor art examples

[shiffman]

There are many artists that have worked with attractors over the years to create patterns. What are some examples I can include that represent a diversity of work and artists?

      <p>
        In the example above, there is a system (i.e. array) of
        <code>Mover</code> objects and one <code>Attractor</code> object. Build
        an example that has systems of both movers and attractors. What if you
        make the attractors invisible? Can you create a pattern/design from the
        trails of objects moving around attractors? See the <a
          href="http://processing.org/exhibition/works/metropop/">Metropop
          Denim project by Clayton Cubitt and Tom
          Carden</a> for an example.
      </p>

[shiffman]

ran out of time, just not including an example here!