body {
  text-align: center;
  font-family: Arial, sans-serif;
  background: #222;
  color: white;
  padding-top: 50px;
}

.dice {
  font-size: 60px;
  margin: 20px;
}

button {
  padding: 10px 20px;
  font-size: 18px;
  cursor: pointer;
}

@keyframes flicker {
  0% { background-color: black; }
  25% { background-color: red; }
  50% { background-color: yellow; }
  75% { background-color: red; }
  100% { background-color: black; }
}

.flicker-effect {
  animation: flicker 0.1s infinite;
}