hugo-theme/layouts/404.html

{{ define "main" }}
<div class="panel">
    <h1>Well, aren't you a busy bee?</h1>
    <p>
        Looks like you're a bit lost. Let's not wander too far from the hive, though.
    </p>
    <p>
        Why not check some of these posts to get back?
    </p>
</div>

<div class="panel">
    <div id="blog-flex">
        {{- range first 3 (shuffle (where .Site.RegularPages "Section" "blog")) }}
        {{ partial "micropanel.html" . }}
        {{- end }}
    </div>
</div>
{{ end }}