* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  background: #001219;
  overflow: hidden;
}

.circle {
  position: absolute;
  bottom: 0;
  width: 20px;
  aspect-ratio: 1/1;
  background: #fca311;
  box-shadow: 0 0 10px #ff5400, 0 0 20px #ff5400, 0 0 30px #ff5400,
    0 0 50px #ff5400;
  border-radius: 50%;
  animation: animate 5s linear forwards;
}

@keyframes animate {
  0% {
    transform: translatey(0);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translatey(-100vh);
    opacity: 1;
  }
}

.circle::before {
  content: "";
  position: absolute;
  bottom: 100%;
  left: 25%;
  width: 50%;
  height: 100vh;
  opacity: 0.5s;
  background: linear-gradient(#ff5400, transparent);
}