#myBtn {
    display: none; /* Hidden by default */
    position: fixed; /* Fixed/sticky position */
    bottom: 20px;
    right: 0px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: #e67006;
    color: white;
    cursor: pointer;
    padding: 10px;
    border-radius: 10px 10px 0px 0px;
    font-size: 30px;
    transform: rotate(270deg);
}

    #myBtn:hover {
        background: #010101;
        color: white;
    }