CODE JAVASCRIPT de l'ANIMATION CANVAS

	var context = document.getElementById("demo").getContext("2d");
	var lastX = context.canvas.width * Math.random();
	var lastY = context.canvas.height * Math.random();
	var hue = 0;
	function line() {
		context.save();
		context.translate(context.canvas.width/2, context.canvas.height/2);
		context.scale(0.9, 0.9);
		context.translate(-context.canvas.width/2, -context.canvas.height/2);
		context.beginPath();
		context.lineWidth = 5 + Math.random() * 10;
		context.moveTo(lastX, lastY);
		lastX = context.canvas.width * Math.random();
		lastY = context.canvas.height * Math.random();
		context.bezierCurveTo(context.canvas.width * Math.random(),
	                              context.canvas.height * Math.random(),
	                              context.canvas.width * Math.random(),
	                              context.canvas.height * Math.random(),
	                              lastX, lastY);
		hue = hue + 10 * Math.random();
		context.strokeStyle = "hsl(" + hue + ", 50%, 50%)";
		context.shadowColor = "white";
		context.shadowBlur = 10;
		context.stroke();
		context.restore();
	}
	setInterval(line, 50);
	function blank() {
		context.fillStyle = "rgba(0, 0, 0, 1)";
		context.fillRect(0, 0, context.canvas.width, context.canvas.height);
	}
	setInterval(blank, 40);