How to create a form add button

There is a code to add text to the iframe. How to add a button to create new fields for text

$("#text1").click(function(e) {
  var x = document.getElementById("fname").value;
  document.getElementById("output").setAttribute("text", "value", x);
  return false;
});

form {
  position: absolute;
  z-index: 1;
  background: white;
  padding: 1em;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://aframe.io/releases/0.8.2/aframe.min.js"></script>

<form name="myForm" href="" onsubmit="text">
  id: <input type="number" value="text" name="fname" id="fname"><br><br>
  <input id="text1" type="submit" value="Отправить">
</form>

<a-scene background="color: black">
  <a-entity id="output" text="value: output; align: center;" position="0 1.6 -0.5"></a-entity>
</a-scene>