body {
  width: 1920px;
  height: 1080px;
  margin: 0;
  padding: 0;
  background: url(../img/bg.png);
}

.overlay {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
}

.liveBox {
  width: 1480px;
  height: 920px;

  background-color: blue;

  position: fixed;
  top: 0;
  left: 0;
}

.greatWeb {
  width: 440px;
  color: whitesmoke;

  position: fixed;
  top: 0;
  right: 0;
}

.stage {
  width: 100%;
}

.stage > div {
  width: 100%;
  height: 100px;
  background-size: cover;
  position: absolute;
  animation: slide 30s infinite;
  opacity: 0;
}

.stage > div:nth-child(2) {
  animation-delay: 5s;
}

.stage > div:nth-child(3) {
  animation-delay: 10s;
}

.stage > div:nth-child(4) {
  animation-delay: 15s;
}

.stage > div:nth-child(5) {
  animation-delay: 20s;
}

.stage > div:nth-child(6) {
  animation-delay: 25s;
}

@keyframes slide {
  10% {
    opacity: 1;
  }
  20% {
    opacity: 1;
  }
  30% {
    opacity: 0;
  }
}