
  <p>Click, tap, or press the space bar to start the animation (disabled by default to protect those who suffer migraines when experiencing such animations).</p>
  <div>

  </div>

  <script>
    const divElem = document.querySelector('div');

    document.addEventListener('keypress', function(e) {
      if(e.key === ' ') {
        startAnimation();
      }
    });
    document.addEventListener('click', startAnimation);

    function startAnimation() {
      document.body.addEventListener('mousemove', evt 