body{
    background: lightyellow;
}

h1{
    text-align: center;
}
#image{
    width: 800px;
    height: 500px;
    margin: auto;
    border: 1px solid #000;
    background-image: url(bilder/bild1.jpg);
    background-size: cover;
}
#left{
    width: 10%;
    height: 100%;
    text-align: center;
    font-size: 30px;
    padding: 220px 0px;

}
#right{
    width: 10%;
    height: 100%;
    text-align: center;
    font-size: 30px;
    margin: -117.5% 90%;
    padding: 220px 0px;
}

#left:hover{
    background-color: rgb(255, 255, 255, 50%)
}
#right:hover{
    background-color: rgb(255, 255, 255, 50%)
}
#thumbs{
    width: 800px;
    height: 500px;
    margin: 10px auto;
}
.thumb{
    width: 160px;
    height: 100px;
    margin: 10px 19px;
    border: 1px solid lightyellow;
    background-image: url();
}
.thumb:hover{
    border: 1px solid #000;
}