body {
  font-family: Arial, sans-serif;
  text-align: center;
}

h1 {
  margin-bottom: 20px;
}

.light {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 10px;
  transition: opacity 0.5s ease-in-out; /* Smooth transition for light changes */
}