*, *::before, *::after {
  box-sizing: border-box;
}

.lightning .top::before, .lightning .middle::before, .house__roof-one::before, .house__roof-one::after, .house__roof-two::before {
  content: '';
  display: block;
  position: absolute;
}

body {
  background: #141413;
  animation: strike 8s linear infinite;
  width: 100%;
  min-height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}
body > * {
  position: absolute;
}

.lightning {
  width: 10rem;
  height: 100vh;
  min-height: 800px;
  z-index: 5;
  opacity: 0;
  animation: flash 8s linear infinite;
}
.lightning .top {
  position: absolute;
  top: -0.5rem;
  right: 0;
  width: 0.25rem;
  height: 25%;
  background: white;
  transform-origin: top left;
  transform: rotate(45deg);
  box-shadow: 0 0 16px 0 white;
}
.lightning .top::before {
  width: 0.25rem;
  height: 70%;
  background: white;
  top: 100%;
  left: 3px;
  transform-origin: top left;
  transform: rotate(-133deg);
  box-shadow: 0 0 16px 0 white;
}
.lightning .middle {
  position: absolute;
  top: 17%;
  right: 0;
  width: 0.25rem;
  height: 30%;
  background: white;
  transform-origin: top left;
  transform: rotate(28deg);
  box-shadow: 0 0 16px 0 white;
}
.lightning .middle::before {
  width: 0.25rem;
  height: 52%;
  background: white;
  top: 100%;
  left: 0;
  transform-origin: top left;
  transform: rotate(-91deg);
  box-shadow: 0 0 16px 0 white;
}
.lightning .bottom {
  position: absolute;
  top: 50%;
  right: 0;
  width: 0.25rem;
  height: 60%;
  background: white;
  transform-origin: top left;
  transform: rotate(28deg);
  box-shadow: 0 0 16px 0 white;
}

.house {
  bottom: 5rem;
  width: 26rem;
  height: 15rem;
}
.house > * {
  position: absolute;
  background: #141413;
}
.house__main {
  width: 24.5rem;
  height: 9rem;
  bottom: 0;
  left: 0;
}
.house__roof-one {
  width: 15rem;
  height: 8rem;
  left: 0rem;
  top: 2rem;
}
.house__roof-one::before, .house__roof-one::after {
  border: 2rem solid transparent;
  border-bottom: 8rem solid #141413;
}
.house__roof-one::before {
  left: -2rem;
  top: -2rem;
}
.house__roof-one::after {
  right: -2rem;
  top: -2rem;
}
.house__roof-two {
  width: 10rem;
  height: 5rem;
  right: 2rem;
  top: 4rem;
}
.house__roof-two::before {
  border: 2rem solid transparent;
  border-bottom: 6rem solid #141413;
  top: -2rem;
  right: -2rem;
}

.ground {
  bottom: 0;
  width: 100%;
  height: 5rem;
  background: #141413;
  z-index: 10;
}

@keyframes flash {
  0%, 30%, 36%, 63%, 69%, 100% {
    opacity: 0;
  }
  33%, 66% {
    opacity: 1;
  }
}
@keyframes strike {
  0%, 30%, 36%, 63%, 69%, 100% {
    background: #141413;
  }
  33%, 66% {
    background: #3E3E3D;
  }
}