Custom Code to make Embeded Pinterest profile responsive

Website password: NewlinWrites

I have an embedded Pinterest profile that I added to my client's site following the directions at: https://developers.pinterest.com/docs/add-ons/profile-widget/

I would like to make this responsive instead of giving it a set size. I am wondering if anyone knows what code I would add to achieve this, or if it is possible at all? 

This is my current code:

<script
    type="text/javascript"
    async defer src="//assets.pinterest.com/js/pinit.js"
></script>
<a data-pin-do="embedBoard" data-pin-board-width="400" data-pin-scale-height="320" data-pin-scale-width="80" href="https://www.pinterest.com/metanewlinwrites/blog"></a>

Thank you!

You could try changing the width from 400 to 100% and see what change that makes.

I did try that, but it turned out very small.

Yes, interesting, what a strange embed code. Did it come directly from Pinterest?