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Babel includes JSX processing.

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    <script src=""></script>
    <script src=""></script>
    <script src=""></script>
    <link rel="stylesheet" type="text/css" href="style.css">
    <script src="sketch.js"></script>



                html, body {
  margin: 0;
  padding: 0;



Converted from Processing 3.0 to JS 
thanks to

function setup() {
  createCanvas(640, 360, P2D);
  colorMode(HSB, 360, 100,100,100) ;
  background(360) ;  // white

function draw() {
  // Rectangle opaque (sans transparence) blue violet
  fill(271, 100, 89, 100);  
  rect(40, 50, 150, 200);
  // Arc de cercle (avec transparence) cyan (bleu clair) 
  fill(180, 100, 100,20);  
  arc(479, 300, 280, 280, PI, TWO_PI);  
  // Cercle tracé par la souris rouge sang opaque
  fill(353, 95, 73, 100);  
  ellipse(mouseX, mouseY, 20, 20);
  // triangle avec transparence jaune doré  
  fill(43, 94, 72, 10);  
  triangle(100, 25, 150, 340, 450, 260); 
  for (var i = 0; i<=360; i+= 60) {
      fill(i, 100, 100, 100);
      ellipse( 150+i, 10 , 20, 20);