how to theme the subscription form html?

How do you theme the subscription form html?

To be more specific, how do I access the code below in my own theme file?

<form action="" method="post" id="frm-subscriptionFront">

<table>
<tr class="required">
	<th><label for="frm-email" class="required">Your e-mail address</label></th>

	<td><input type="text" name="email" id="frm-email" required data-nette-rules='[{"op":":filled","msg":"E-mail address is requried."},{"op":":email","msg":"Your e-mail address must be valid."}]' value="" class="text"></td>
</tr>

<tr>
	<th></th>

	<td><input type="submit" name="_submit" class="subscribeButton button" value="Subscribe"></td>
</tr>
</table>

<div><input type="hidden" name="_form_" value="subscriptionFront"><!--[if IE]><input type=IEbug disabled style="display:none"><![endif]--></div>
</form>

https://www.ads-software.com/plugins/simple-subscribe/