#myBtn {
display:none;
position: fixed;
bottom: 20px;
right: 30px;
z-index: 1000;
border: none;
outline: none;
background-color: gray;
opacity: 0.5;
filter: alpha(opacity=50);
color: white;
cursor: pointer;
padding:2px;
border-radius: 50%;
text-decoration:none;

font-size:2rem;



}
#myBtn:hover, #myBtn:focus, #myBtn:active {
background-color: #555;
}

.fa-chevron-circle-down {
border: none;
outline: none;
background-color: gray;
opacity: 0.5;
filter: alpha(opacity=50);
color: white;
cursor: pointer;
padding:2px;
border-radius: 50%;
text-decoration:none;

font-size:1.2rem;
}

.hvr-icon-back > .fa-chevron-circle-left  {
border: none;
outline: none;
background-color: gray;
opacity: 0.5;
filter: alpha(opacity=50);
color: white;
cursor: pointer;
padding:2px;
border-radius: 50%;
text-decoration:none;

font-size:1.2rem;
}