html, body {
    height: 100vh;
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: #eee;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

button {
    margin: 5px;
    padding: 10px;
    font-size: 16px;
}

.controls {
    margin-top: 20px;
}

.example_path {
    width: 800px;
    height: 600px;
    background: url('images/travel-road.jpg');
    background-size: cover;
    background-position: 50% 50%;
    position: relative;
    overflow: hidden;
    border: 2px solid #333;
}

.example_block {
    width: 152px;
    height: 84px;
    background: url('images/dodgechallengerrearview.png');
    background-size: cover;
    position: absolute;
    left: 0px;
    top: 0px;
}