Nave alienígena

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HTML

<div class="star medium"></div>
 <div class="star medium"></div>
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<div class="star large"></div>
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 <div class="star large"></div>
 <div class="star large"></div>
 <div class="star large"></div>
 <div class="container">
  <div class="sphere-container">
   <div class="sphere">

</div>
  </div>
  <div class="base">
   <div></div>
   <div></div>
   <div></div>
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  </div>
 </div>

</body>

CSS

*{
 margin: 0;
 padding:0;
}
body{
 width: 100vw;
 height:100vh;
 overflow:hidden;
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: center;
 background: #000;
}
/*container com a animacao desejada */
.container{
 animation: alienAnimation 15s linear forwards;
}
@keyframes alienAnimation{
 0%{
  transform: scale(0.5) translate(0,0);
 }
 20%{
  transform: scale(2) translate(0,0);
 }
 50%{
  transform:scale(2) translate(0,150px);
 }
 51%{
  transform:scale(2) translate(0,150px);
 }
 60%{
  transform:scale(2) translate(60px,120px);
 }

70%{
  transform:scale(2) translate(-60px,90px);
 }
 80%{
  transform:scale(2) translate(60px,60px);
 }

90%{
  transform:scale(2) translate(-60px,30px);
 }
 100%{
  transform:scale(2) translate(-60px,0);
 }

}
/* estrelas */
.star {
 position: absolute;
 background: white;
 border-radius: 50%;
 animation: twinkle 2s infinite alternate;
}

.star.small {
 width: 1px;
 height: 1px;
}

.star.medium {
 width: 2px;
 height: 2px;
}

.star.large {
 width: 3px;
 height: 3px;
 box-shadow: 0 0 6px rgba(255, 255, 255, 0.8);
}

@keyframes twinkle {
 0% { opacity: 0.3; }
 100% { opacity: 1; }
}

/* Estrelas pequenas */
.star:nth-child(1) { top: 15%; left: 10%; animation-delay: 0.2s; animation-duration: 2.5s; }
.star:nth-child(2) { top: 25%; left: 25%; animation-delay: 1.1s; animation-duration: 1.8s; }
.star:nth-child(3) { top: 8%; left: 40%; animation-delay: 0.7s; animation-duration: 3.2s; }
.star:nth-child(4) { top: 35%; left: 60%; animation-delay: 1.8s; animation-duration: 2.1s; }
.star:nth-child(5) { top: 55%; left: 15%; animation-delay: 0.4s; animation-duration: 2.8s; }
.star:nth-child(6) { top: 70%; left: 35%; animation-delay: 1.5s; animation-duration: 1.6s; }
.star:nth-child(7) { top: 45%; left: 80%; animation-delay: 0.9s; animation-duration: 2.4s; }
.star:nth-child(8) { top: 80%; left: 70%; animation-delay: 1.2s; animation-duration: 3.1s; }
.star:nth-child(9) { top: 20%; left: 85%; animation-delay: 0.6s; animation-duration: 1.9s; }
.star:nth-child(10) { top: 90%; left: 20%; animation-delay: 1.7s; animation-duration: 2.6s; }
.star:nth-child(11) { top: 12%; left: 65%; animation-delay: 0.3s; animation-duration: 2.2s; }
.star:nth-child(12) { top: 38%; left: 5%; animation-delay: 1.4s; animation-duration: 2.9s; }
.star:nth-child(13) { top: 62%; left: 45%; animation-delay: 0.8s; animation-duration: 1.7s; }
.star:nth-child(14) { top: 75%; left: 90%; animation-delay: 1.6s; animation-duration: 2.3s; }
.star:nth-child(15) { top: 85%; left: 50%; animation-delay: 0.5s; animation-duration: 3.0s; }
.star:nth-child(16) { top: 30%; left: 95%; animation-delay: 1.3s; animation-duration: 1.5s; }
.star:nth-child(17) { top: 5%; left: 75%; animation-delay: 0.1s; animation-duration: 2.7s; }
.star:nth-child(18) { top: 50%; left: 30%; animation-delay: 1.9s; animation-duration: 2.0s; }
.star:nth-child(19) { top: 65%; left: 8%; animation-delay: 0.7s; animation-duration: 2.5s; }
.star:nth-child(20) { top: 95%; left: 40%; animation-delay: 1.0s; animation-duration: 1.8s; }
.star:nth-child(21) { top: 18%; left: 52%; animation-delay: 0.4s; animation-duration: 2.4s; }
.star:nth-child(22) { top: 42%; left: 12%; animation-delay: 1.5s; animation-duration: 2.8s; }
.star:nth-child(23) { top: 78%; left: 62%; animation-delay: 0.9s; animation-duration: 1.6s; }
.star:nth-child(24) { top: 28%; left: 78%; animation-delay: 1.2s; animation-duration: 3.2s; }
.star:nth-child(25) { top: 52%; left: 88%; animation-delay: 0.6s; animation-duration: 2.1s; }
.star:nth-child(26) { top: 88%; left: 15%; animation-delay: 1.8s; animation-duration: 2.6s; }
.star:nth-child(27) { top: 6%; left: 92%; animation-delay: 0.3s; animation-duration: 1.9s; }
.star:nth-child(28) { top: 72%; left: 25%; animation-delay: 1.4s; animation-duration: 2.2s; }
.star:nth-child(29) { top: 48%; left: 68%; animation-delay: 0.8s; animation-duration: 2.9s; }
.star:nth-child(30) { top: 92%; left: 85%; animation-delay: 1.6s; animation-duration: 1.7s; }
.star:nth-child(31) { top: 22%; left: 32%; animation-delay: 0.5s; animation-duration: 2.3s; }
.star:nth-child(32) { top: 58%; left: 2%; animation-delay: 1.3s; animation-duration: 3.0s; }
.star:nth-child(33) { top: 82%; left: 48%; animation-delay: 0.1s; animation-duration: 1.5s; }
.star:nth-child(34) { top: 32%; left: 72%; animation-delay: 1.9s; animation-duration: 2.7s; }
.star:nth-child(35) { top: 68%; left: 92%; animation-delay: 0.7s; animation-duration: 2.0s; }
.star:nth-child(36) { top: 98%; left: 22%; animation-delay: 1.0s; animation-duration: 2.5s; }
.star:nth-child(37) { top: 14%; left: 82%; animation-delay: 0.4s; animation-duration: 1.8s; }
.star:nth-child(38) { top: 46%; left: 38%; animation-delay: 1.5s; animation-duration: 2.4s; }
.star:nth-child(39) { top: 76%; left: 58%; animation-delay: 0.9s; animation-duration: 2.8s; }
.star:nth-child(40) { top: 26%; left: 18%; animation-delay: 1.2s; animation-duration: 1.6s; }
.star:nth-child(41) { top: 54%; left: 78%; animation-delay: 0.6s; animation-duration: 3.2s; }
.star:nth-child(42) { top: 84%; left: 38%; animation-delay: 1.8s; animation-duration: 2.1s; }
.star:nth-child(43) { top: 4%; left: 58%; animation-delay: 0.3s; animation-duration: 2.6s; }
.star:nth-child(44) { top: 64%; left: 8%; animation-delay: 1.4s; animation-duration: 1.9s; }
.star:nth-child(45) { top: 36%; left: 48%; animation-delay: 0.8s; animation-duration: 2.2s; }
.star:nth-child(46) { top: 94%; left: 68%; animation-delay: 1.6s; animation-duration: 2.9s; }
.star:nth-child(47) { top: 16%; left: 28%; animation-delay: 0.5s; animation-duration: 1.7s; }
.star:nth-child(48) { top: 44%; left: 88%; animation-delay: 1.3s; animation-duration: 2.3s; }
.star:nth-child(49) { top: 74%; left: 18%; animation-delay: 0.1s; animation-duration: 3.0s; }
.star:nth-child(50) { top: 86%; left: 78%; animation-delay: 1.9s; animation-duration: 1.5s; }

/* Estrelas médias */
.star:nth-child(51) { top: 11%; left: 35%; animation-delay: 0.7s; animation-duration: 2.7s; }
.star:nth-child(52) { top: 33%; left: 55%; animation-delay: 1.0s; animation-duration: 2.0s; }
.star:nth-child(53) { top: 59%; left: 75%; animation-delay: 0.2s; animation-duration: 2.5s; }
.star:nth-child(54) { top: 77%; left: 95%; animation-delay: 1.8s; animation-duration: 1.8s; }
.star:nth-child(55) { top: 23%; left: 65%; animation-delay: 0.4s; animation-duration: 2.4s; }
.star:nth-child(56) { top: 41%; left: 25%; animation-delay: 1.5s; animation-duration: 2.8s; }
.star:nth-child(57) { top: 67%; left: 45%; animation-delay: 0.9s; animation-duration: 1.6s; }
.star:nth-child(58) { top: 89%; left: 5%; animation-delay: 1.2s; animation-duration: 3.2s; }
.star:nth-child(59) { top: 7%; left: 85%; animation-delay: 0.6s; animation-duration: 2.1s; }
.star:nth-child(60) { top: 51%; left: 15%; animation-delay: 1.8s; animation-duration: 2.6s; }

/* Estrelas grandes */
.star:nth-child(61) { top: 19%; left: 45%; animation-delay: 0.3s; animation-duration: 1.9s; }
.star:nth-child(62) { top: 37%; left: 65%; animation-delay: 1.4s; animation-duration: 2.2s; }
.star:nth-child(63) { top: 63%; left: 85%; animation-delay: 0.8s; animation-duration: 2.9s; }
.star:nth-child(64) { top: 81%; left: 25%; animation-delay: 1.6s; animation-duration: 1.7s; }
.star:nth-child(65) { top: 29%; left: 5%; animation-delay: 0.5s; animation-duration: 2.3s; }
.star:nth-child(66) { top: 53%; left: 55%; animation-delay: 1.3s; animation-duration: 3.0s; }
.star:nth-child(67) { top: 71%; left: 75%; animation-delay: 0.1s; animation-duration: 1.5s; }
.star:nth-child(68) { top: 97%; left: 35%; animation-delay: 1.9s; animation-duration: 2.7s; }
.star:nth-child(69) { top: 13%; left: 95%; animation-delay: 0.7s; animation-duration: 2.0s; }
.star:nth-child(70) { top: 43%; left: 15%; animation-delay: 1.0s; animation-duration: 2.5s; }
/* estilo comum dos segmentos da base */
.base div{
 position: absolute;
 width: 25px;
 height: 92px;
 left: 94px;
 top: 54px;
 transform-origin: 6px 100px;
 background: radial-gradient(ellipse at 30% 30%, 
   #00ffff 0%, 
   #00e6e6 15%, 
   #0080ff 30%, 
   #004080 50%, 
   #002040 70%, 
   #001122 85%, 
   #000811 100%);
 border-radius: 2px;
 box-shadow: inset 0 0 15px rgba(0, 255, 255, 0.5),
  0 0 100px rgba(0, 128, 255, 0.3);

}
/*base */
.base{
 position: relative;
 width: 200px;
 height: 200px;
 transform-style: preserve-3d;
 scale:0.5;
 transform: rotateX(0deg) rotateY(0deg);
 margin: 50px auto;
 animation: coolRotation 3s linear forwards;

}
@keyframes coolRotation{
 0%,99%{
  transform: rotateX(-15deg) rotateY(0deg);
 }
 100%{
  transform: rotateX(0) rotateY(0deg);
 }
}
/* esfera da base (apenas um circulo visto de frente  e cor radial)*/
.base::before{
 content:'';
 width: 65px;
 height:65px;
 transform:translateX(68px) translateY(75px);
 border-radius:50%;
 background: radial-gradient(ellipse at 30% 30%, 
   #ff00ff 0%, 
   #e600e6 15%, 
   #8000ff 30%, 
   #4000aa 50%, 
   #200055 70%, 
   #110033 85%, 
   #080011 100%);
 position:absolute;
 box-shadow: inset 0 0 20px rgba(255, 0, 255, 0.6),
  0 0 30px rgba(128, 0, 255, 0.5),
  0 0 60px rgba(255, 0, 255, 0.2);
}
/* Segmentos do cone - rotação Y para posição circular + rotação X para inclinar em direção ao centro */
.base div:nth-child(1) { transform: rotateY(0deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(2) { transform: rotateY(12deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(3) { transform: rotateY(24deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(4) { transform: rotateY(36deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(5) { transform: rotateY(48deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(6) { transform: rotateY(60deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(7) { transform: rotateY(72deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(8) { transform: rotateY(84deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(9) { transform: rotateY(96deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(10) { transform: rotateY(108deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(11) { transform: rotateY(120deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(12) { transform: rotateY(132deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(13) { transform: rotateY(144deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(14) { transform: rotateY(156deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(15) { transform: rotateY(168deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(16) { transform: rotateY(180deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(17) { transform: rotateY(192deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(18) { transform: rotateY(204deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(19) { transform: rotateY(216deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(20) { transform: rotateY(228deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(21) { transform: rotateY(240deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(22) { transform: rotateY(252deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(23) { transform: rotateY(264deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(24) { transform: rotateY(276deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(25) { transform: rotateY(288deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(26) { transform: rotateY(300deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(27) { transform: rotateY(312deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(28) { transform: rotateY(324deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(29) { transform: rotateY(336deg) translateZ(120px) rotateX(60deg); }
.base div:nth-child(30) { transform: rotateY(348deg) translateZ(120px) rotateX(60deg); }