body {
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-image: url('image/fondintro.jpg'); 
            background-size: cover;
            background-position: center; 
        }
		
		
        canvas {
            border: 2px solid black;
        }