#myBtn 
{
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: #1E4A5A;
    color: white;
    cursor: pointer;
    padding: 15px;
    height: 50px;
    width: 50px;
    border-radius: 50%;
}
#myBtn:hover 
{
    background-color: #93c9c3;
}