.slow {
  width: 80px;
  height: 80px;
  background-color: #1abc9c;
  border-radius: 50%;
  transition-duration: 1s;
  transition-property: all;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  margin: 20px auto;
}

.slow:hover {
  width: 120px;
  height: 120px;
  background-color: #16a085;
  border-radius: 20px;
  transform: rotate(180deg);
}