#myBtn {
    display: none;
    /* Hidden by default */
    position: fixed;
    /* Fixed/sticky position */
    bottom: 40px;
    /* Place the button at the bottom of the page og:20*/
    right: 14.5px;
    /* Place the button 0px from the right */
    z-index: 99;
    /* Make sure it does not overlap */
    border: none;
    /* Remove borders */
    outline: none;
    /* Remove outline */
    background-color: #0f0f0f;
    /* Set a background color */
    color: white;
    /* Text color */
    cursor: pointer;
    /* Add a mouse pointer on hover */
    padding: 15px;
    /* Some padding */
    border-radius: 40px;
    /* Rounded corners */
    font-size: 18px;
    /* Increase font size og:18*/
    width: 70px;
    /*og: 70*/
    height: 70px;
    text-align: center;
    /*-webkit-border-radius: 40px 0px 0px 40px;
  -moz-border-radius: 40px 0px 0px 40px; 
  border-radius: 40px 0px 0px 40px; */
    transition-duration: 0.4s;
}

#myBtn:hover {
    background-color: white;
    /* Add a color background on hover */
    color: black;
    /* Add a font color on hover */
    box-shadow: 0 12px 16px 0 rgba(0, 0, 0, 0.24), 0 17px 50px 0 rgba(0, 0, 0, 0.19);
}