Thomas

body {
    font-family: 'Courier New', Courier, monospace;
    color: green;
}


img {
    width: 300px;
    height: 300px;
    border-radius:30px;
}



.survol:hover {
    opacity : 0.8;
    background-color: orange;
    cursor: pointer;
}

/* img[src="http://images.innoveduc.fr/integration_parcours/css/css_selectors_props/hobbit-house-grass.jpg"] { */

img:nth-of-type(2) {
    filter: grayscale(100%);
}