Twinkling Libra Constellation (CSS Only)

index.html

<div class='night-sky'>
  <div class="star-box">
    <div class='star twinkle-star-1'></div>
    <div class='star twinkle-star-2'></div>
    <div class='star twinkle-star-3'></div>
    <div class='star twinkle-star-4'></div>
    <div class='star twinkle-star-5'></div>
    <div class='star twinkle-star-6'></div>
    <div class='star twinkle-star-7'></div>
    <div class="line line-1"></div>
    <div class="line line-2"></div>
    <div class="line line-3"></div>
    <div class="line line-4"></div>
    <div class="line line-5"></div>
    <div class="line line-6"></div>
    <div class="line line-7"></div>
  </div>
 </div>

script.js

// Constellation position and colors based on a NASA photo:
// http://www.constellation-guide.com/wp-content/uploads/2013/03/Libra-stars-and-location-of-HD-140283.jpg 

// Star twinkle effect inspired by user @jeryj's codepen "Night Sky" http://codepen.io/jeryj/pen/YqyaJJ

style.css

/* general styles */

html {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}

body {
  margin: 0;
  padding: 0;
}

.night-sky {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  width: 100%;
  margin: 0;
  padding: 0;
  background: #111;
  background: url('https://hd.unsplash.com/photo-1439923274069-a6f070db0c99');
  background-size: cover;
  overflow: hidden;
}

.star-box {
  width: 320px;
  height: 360px;
  position: relative;
  margin: 0 auto;
}

/* star styling */

.star {
  position: absolute;
  box-shadow: 0 0 3px #fff;
  border-radius: 50%;
}

.twinkle-star-1 {
  width: 5px;
  height: 6px;
  right: 16%;
  top: 45%;
  background: #b6c8ff;
  -webkit-animation: twinkle 0.5s alternate infinite;
          animation: twinkle 0.5s alternate infinite;
  -webkit-animation-delay: 1.61404s;
          animation-delay: 1.61404s;
}

.twinkle-star-2 {
  right: 32%;
  top: 84.5%;
  width: 4px;
  height: 4px;
  background: #f4ccbf;
  -webkit-animation: twinkle 0.5s alternate infinite;
          animation: twinkle 0.5s alternate infinite;
  -webkit-animation-delay: 4.09091s;
          animation-delay: 4.09091s;
}

.twinkle-star-3 {
  background: #f4ccbf;
  width: 3px;
  height: 3px;
  left: 30%;
  top: 97%;
  -webkit-animation: twinkle 0.75s alternate infinite;
          animation: twinkle 0.75s alternate infinite;
  -webkit-animation-delay: 1.77143s;
          animation-delay: 1.77143s;
}

.twinkle-star-4 {
  width: 5px;
  height: 5px;
  left: 53%;
  top: 16.8%;
  background: #b6c8ff;
  -webkit-animation: twinkle 0.5s alternate infinite;
          animation: twinkle 0.5s alternate infinite;
  -webkit-animation-delay: 1.55357s;
          animation-delay: 1.55357s;
}

.twinkle-star-5 {
  background: #f4aaaa;
  width: 4px;
  height: 4px;
  left: 32%;
  top: 40%;
  -webkit-animation: twinkle 0.75s alternate infinite;
          animation: twinkle 0.75s alternate infinite;
  -webkit-animation-delay: 0.88462s;
          animation-delay: 0.88462s;
}

.twinkle-star-6 {
  background: #f4aaaa;
  width: 3px;
  height: 3px;
  left: 10%;
  top: 48.5%;
  -webkit-animation: twinkle 0.5s alternate infinite;
          animation: twinkle 0.5s alternate infinite;
  -webkit-animation-delay: 0.66s;
          animation-delay: 0.66s;
}

.twinkle-star-7 {
  background: #b6c8f9;
  width: 3px;
  height: 3px;
  left: 29%;
  bottom: -4%;
  -webkit-animation: twinkle 0.75s alternate infinite;
          animation: twinkle 0.75s alternate infinite;
  -webkit-animation-delay: 0.03279s;
          animation-delay: 0.03279s;
}

/* line styling */

.line {
  width: 1px;
  height: 1px;
  position: absolute;
  background: rgba(246,218,230,0.65);
  -webkit-animation: line 7s alternate infinite;
          animation: line 7s alternate infinite;
  -webkit-animation-delay: 1s;
          animation-delay: 1s;
}

.line-1 {
  height: 215px;
  transform: rotate(-10deg);
  top: 21.5%;
  left: 60.2%;
}

.line-2 {
  height: 105px;
  transform: rotate(-42deg);
  top: 17%;
  left: 68.5%;
}

.line-3 {
  height: 119px;
  transform: rotate(20deg);
  top: 49%;
  left: 75.5%;
}

.line-4 {
  height: 75px;
  transform: rotate(-142deg);
  top: 19%;
  left: 43%;
}

.line-5 {
  height: 48px;
  transform: rotate(69deg);
  top: 38.2%;
  left: 21.5%;
}

.line-6 {
  height: 101px;
  transform: rotate(69deg);
  top: 77.5%;
  left: 48%;
}

.line-7 {
  height: 8px;
  transform: rotate(9deg);
  top: 99.5%;
  left: 29.8%;
}

/* the keyframes! */

@keyframes twinkle {
  0% {
    opacity: .45;
  }
  100% {
    opacity: 1;
  }
}

@keyframes line {
  0% {
    opacity: .5;
  }
  20% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

twinkling-libra-constellation-css-only.markdown

Twinkling Libra Constellation (CSS Only)

A Pen by lindsie on CodePen.

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