epetition.  Using 10000 steps, the
      approximation begins to become accurate enough that we can see that the
      waves seem to have a fixed period and amplitude.
    </p>

    <h3 align = "center">
      Usage:
    </h3>

    <p>
      <blockquote>
        <b>fd_predator_prey</b> <i>step_num</i>
      </blockquote>
      where
      <ul>
        <li>
          <i>step_num</i> is the number of time steps to take.
        </li>
      </ul>
    </p>

    <h3 align = "center">
      Licensing:
    </h3>

