elements under p5 canvas

JavaScript
// sketch.js

function setup() {
  var canvas = createCanvas(100, 100);
 
  // Move the canvas so it’s inside our <div id="sketch-holder">.
  canvas.parent('sketch-holder');

  background(255, 0, 200);
}<html>
  <head>
    <title>My Sketch</title>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.6/p5.js"></script>
    <script src="sketch.js"></script>
  </head>
  <body>
    <p>Here is my sketch:</p>
    <div id="sketch-holder">
      <!-- Our sketch will go here! -->
    </div>
    <p>Pretty cool, eh?</p>
  </body>
</html>
Source

Also in JavaScript: