<form
action="https://www.easy-forms.com/<FORM_KEY>"
method="post"
target="_blank"
onsubmit="this.reset();"
>
<label for="first-name">First name:</label>
<input type="text" id="first-name" name="first-name">
<label for="last-name">Last name:</label>
<input type="text" id="last-name" name="last-name">
<input type="submit" value="Submit">
</form>