.text-block {
  width: 250px;
  margin: 50px;
}

#go-top {
  position: fixed; 
  font-family: sans-serif;
  line-height: 30px;
  text-align: center;
  color: #fff;
  bottom: 25px; 
  right: 10px; 
  cursor:pointer; 
  display:none;
  width: 70px;
  height: 30px;
  background: #c0c0c0;
  border-radius: 5px;
}

#go-top:hover {
  background: #333;
}