First step, we need a form tag; this creates a form that's submittable by the user. This is exactly what we're going to use to submit our messages. And on this form tag we're going to add one attribute; it's the id attribute which lets us give this element a unique identifier, making it really easy to target with our JavaScript a bit later on:

<form id>

</form>

I'm going to set id equal to, inside quotes, message-form:

<form id="message-form">

</form>

Now that we have our form tag complete we can add some tags inside of it. To get started we're going to add a button which is going to appear at the bottom of the form. This button on click is going to submit the form. I'm opening and closing my tag, and just inside I can type whatever text I want to appear on the button. I'm going to go with Send:

<form id="message-form">
  <button>Send</button>
</form>