another go implementation
index.html
    <div id='bottom'>
      <div id='message'></div>
      <div id='another' onClick='setup();'>another go</div>
    </div>
styles.css
...
#pane1, #pane3, #bottom {
  flex-direction:column;
...
#another {
  margin-top:2vmin;
  padding:1vmin 2vmin;
  background-color:blue;
  color:white;
}

So all that remains is keeping count of the wins.
Obviously we'll need two globals, both initially set to zero.

var g_computer_count=0;
var g_player_count=0;