html,
body {
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  margin: 0;
  padding: 0;
  
}

body > canvas {
  border: 1px solid black;
  background-color: transparent;
  z-index: 10;
}

body > #sky-top {
  height: 100% !important;
  width: 100% !important;
  background-color: rgb(46, 46, 46);
  position: absolute;
  z-index: 1;
  animation: lightning 20s ease-in-out infinite;
}

@keyframes lightning {
  0% {
    background-color: rgb(46, 46, 46);
  }
  6.25% {
    background-color: rgb(46, 46, 46);
  }
  8% {
    background-color: rgb(255, 255, 255);
  }
  9% {
    background-color: rgb(46, 46, 46);
  }
  11% {
    background-color: rgb(255, 255, 255);
  }
  30% {
    background-color: rgb(46, 46, 46);
  }
  100%{
    background-color: rgb(46, 46, 46);
  }
}

body > #sky-bottom {
  height: 100% !important;
  width: 100% !important;
  position: absolute;
  z-index: 2;
  background: linear-gradient(rgba(255, 255, 255, 0), rgb(120, 140, 155));
}