button layout


index.html body

<body>
  <div id='game'>
    <div id='pane1'>
       <script>squares(); klear(); draw();</script>
    </div>
    <div id='pane2'>
      <div class='button' onClick='one_step();'>one step</div>
    </div>
  </div>
</body>

styles.css extras

#game {
  display:flex;
}
.button {
  padding:.5vmin 1vmin;
  background-color:blue;
  color:white;
  font-size:3vmin;
}