.btn {
    position:fixed;
    left:10px;
    top:10px; 
    background-color: darkgrey; /* Blue background */
    border: none; /* Remove borders */
    color: white; /* White text */
    padding: 30px 32px; /* Some padding */
    font-size: 32px; /* Set a font size */
    cursor: pointer; /* Mouse pointer on hover */
  }
  
  /* Darker background on mouse-over */
  .btn:hover {
    background-color: gray;
  }