#myBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 10;
  font-size: 18px;
  color: #fff;
  outline: none;
  background-color: rgb(152, 61, 58);
  cursor: pointer;
  border-radius: 5px;
  border: none;
  padding: 15px;
  box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.3);
}