html {
    background-color: #333232;
    height: 100%;
}

#container {
    height: 500px;
    width: 500px;
    background-color: white;
    margin: 100px auto;
    text-align: center;
    border: 5px solid black;
}

#image {
    height: 500px;
    width: 500px;
}

.btn {
    margin: 0 auto;
    height: 50px;
    width: 150px;
    margin: 10px;
}