tton id="botm_button">Set Background</button>
    </section>

    <section id="break-on-node-removal-1">
      <h2>Break on Node Removal</h2>
      <div>
        <p id="p_target">Neuromancer</p>
        <p>Stranger in a Strange Land</p>
      </div>
      <button id="delete_button">Delete</button>
    </section>

    <section id="break-on-subtree-modifications-1">
      <h2>Break on Subtree Modifications</h2>
      <div id="ul_target">
        <p id="fire">A Fire Upon the Deep</p>
      </div>
      <button