body{
    background-image: url(monstera.jpg);
    background-position: center;
    background-repeat: no-repeat;
}
#box{
    margin: 0px auto;
    width: 800px;
    height: 100%;
    margin-top: 300px;
    text-align: left;
}

#animale{
    background-image: url(animale.png);
    width: 418px;
    height: 369px;
    position: absolute;
    top: -200px;
    left: 50%;
}