Clock Displayed by its own code.

qclock.html

<script>

(r=()=>setInterval(t=>{for(j=o="\n",y=5;y--;document.body["inn"
+"erHTML"]="<pre>&lt"+(S="script>\n")+o+"\n\n&lt/"+S)for(x=-01;
63-!y>x++;o+=`(r=${r})()`[j++].fontcolor(c?"#FF0":"#444"))c=x/2
%4<3&&parseInt("odRFacb67o2vi5gmOZmwFNteohbOh3sw".slice(i="9"<(
D=Date()[16+(x/8|0)])?30:D*3,i+3),36)&1<<(x/2|0)%4+3*y},100))()

</script>





<!-- some SEO and styling tweak-->
<title>Qlock - A JavaScript Quine Clock</title>
<link href="https://fonts.googleapis.com/css2?family=Fira+Mono" rel="stylesheet">

<style>
  body {
    background-color: black;
    color: #0FF;
    height: 100%;
    margin: 0;
    padding: 0;
  }
  
  pre {
    font-family: "Fira Mono", monospace;
    margin: auto;
    width: 38em;
    top: 50%;
    left: 50%;
    position: absolute;
    margin-top: -5.5em;
    margin-left: -19em;
  }

  @media screen and (min-width: 900px) {
    body {
      font-size: 18px;
    }
  }
</style>