index.html

<html>
  <head>
    <script
      src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.0.0/p5.min.js"
      integrity="sha256-Pg1di+fBF53Rbh9oZR/FeD1xsFzTLC963lcac1D0ias="
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      crossorigin="anonymous"
    ></script>

    <script src="build/build.js"></script>

    <link rel="shortcut icon" href="https://p5js.org/assets/img/favicon.ico" />
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    <style>
      * {
        padding: 0px;
        margin: 0px;
      }
    </style>
    <script></script>
  </head>

  <body></body>
</html>