#divMain{
    width:60%;
    height:600px;
    background-color:rgb(154, 182, 182,0.5);
    margin:auto;
    border:5px solid navy;
}
#ball{
    width:60px;
    height:60px;
    top:400px;
    left:500px;
    border-radius:60px;
    background-color:rgb(151, 85, 181);
    position:relative;
}