Conversation 

$a red box
user 
$<svg width="100" height="100" id="svgContainer" xmlns="http://www.w3.org/2000/svg">
  <rect id="redBox" x="10" y="10" width="80" height="80" fill="red"/>
</svg>
assistant 
$a blue box
user 
$<svg width="100" height="100" id="svgContainer" xmlns="http://www.w3.org/2000/svg">
  <rect id="blueBox" x="10" y="10" width="80" height="80" fill="blue"/>
</svg>
assistant 
$do a another green circle
user 
$<svg width="100" height="100" id="svgContainer" xmlns="http://www.w3.org/2000/svg">
  <circle id="greenCircle" cx="50" cy="50" r="40" fill="green"/>
</svg>
assistant