adding more buttons


index.html pane2

    <div id='pane2'>
      <div class='button' onClick='klear(); draw();'>clear</div>
      <div class='button' onClick='seed(); draw();'>random</div>
      <div class='button' onClick='one_step();'>one step</div>
      <div class='button' onClick='run();'>run</div>
      <div class='button' onClick='stop();'>stop</div>
   </div>

addition to styles.css

#pane2 {
  margin-left:2vmin;
  display:flex;
  flex-direction:column;
  justify-content:space-around;
  text-align:center;
}

All being well, the top three buttons should work straightaway.