body {
  background-color: grey;
  transition: all 1.2s;
}
p {
  font-family: sans-serif;
  color: white;
  font-size: 50px;
  text-align: center;
  position: relative;
  top: 5px;
  pointer-events: none;
}
#aButton {
  background: #60d934;
  background-image: -webkit-linear-gradient(top, #60d934, #138517);
  background-image: -moz-linear-gradient(top, #60d934, #138517);
  background-image: -ms-linear-gradient(top, #60d934, #138517);
  background-image: -o-linear-gradient(top, #60d934, #138517);
  background-image: linear-gradient(to bottom, #60d934, #138517);
  border-radius: 30%;
  color: #ffffff;
  width: 90px;
  height: 70px;
  align-content: center;
  align-self: center;
  text-decoration: none;
  position: relative;
  margin-top: 50%;
  z-index: 1
}

#aButton:hover {
  background: #22ad10;
  text-decoration: none;
}