#myBtn,
#myBtn2,
#myBtn3,
#myBtn4,
#myBtn5 {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  font-size: 18px;
  border: none;
  outline: none;
  background-color: yellowgreen;
  color: white;
  cursor: pointer;
  padding: 15px;
  border-radius: 4px;
}

#myBtn:hover,
#myBtn2:hover,
#myBtn3:hover,
#myBtn4:hover,
#myBtn5:hover {
  background-color: #555;
}

#myBtn2 {
  right: 100px;
  background-color: blue;
}

#myBtn3 {
  top: 60px;
  right: 20px;
  background-color: red;
  bottom: unset;
}

#myBtn4 {
  bottom: 100px;
}

#myBtn5 {
  bottom: 100px;
  right: 140px;
  background-color: blue;
}