#box1{
    width:100px;
    height:100px;
    background-image:url('./1.jpeg');
    background-repeat: no-repeat;
    background-size:100% 100%;
}
#box2{
    width:200px;
    height:200px;
    background-image:url('./2.jpeg');
    background-repeat: no-repeat;
    background-size:100% 100%;
}
#box3{
    width:300px;
    height:300px;
    background-image:url('./3.jpeg');
    background-repeat: no-repeat;
    background-size:100% 100%;
}