Only CSS: Shooting Star

index.pug

.night
  - for (i = 0; i < 20; i++)
    .shooting_star

only-css-shooting-star.markdown

Only CSS: Shooting Star

Meteor shower :)

A Pen by Yusuke Nakaya on CodePen.

License.

style.scss

body {
  background: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);
  height: 100vh;
  overflow: hidden;
  display: flex;
  font-family: 'Anton', sans-serif;
  justify-content: center;
  align-items: center;
}

$shooting-time: 3000ms;

.night {
  position: relative;
  width: 100%;
  height: 100%;
  transform: rotateZ(45deg);
  // animation: sky 200000ms linear infinite;
}

.shooting_star {
  position: absolute;
  left: 50%;
  top: 50%;
  // width: 100px;
  height: 2px;
  background: linear-gradient(-45deg, rgba(95, 145, 255, 1), rgba(0, 0, 255, 0));
  border-radius: 999px;
  filter: drop-shadow(0 0 6px rgba(105, 155, 255, 1));
  animation:
    tail $shooting-time ease-in-out infinite,
    shooting $shooting-time ease-in-out infinite;
  
  &::before {
    content: '';
    position: absolute;
    top: calc(50% - 1px);
    right: 0;
    // width: 30px;
    height: 2px;
    background: linear-gradient(-45deg, rgba(0, 0, 255, 0), rgba(95, 145, 255, 1), rgba(0, 0, 255, 0));
    transform: translateX(50%) rotateZ(45deg);
    border-radius: 100%;
    animation: shining $shooting-time ease-in-out infinite;
  }

  &::after {
    // CodePen Error
    // @extend .shooting_star::before;
    
    content: '';
    position: absolute;
    top: calc(50% - 1px);
    right: 0;
    // width: 30px;
    height: 2px;
    background: linear-gradient(-45deg, rgba(0, 0, 255, 0), rgba(95, 145, 255, 1), rgba(0, 0, 255, 0));
    transform: translateX(50%) rotateZ(45deg);
    border-radius: 100%;
    animation: shining $shooting-time ease-in-out infinite;
    transform: translateX(50%) rotateZ(-45deg);
  }
  
  @for $i from 1 through 20 {
    &:nth-child(#{$i}) {
      $delay: random(9999) + 0ms;
      top: calc(50% - #{random(400) - 200px});
      left: calc(50% - #{random(300) + 0px});
      animation-delay: $delay;
      // opacity: random(50) / 100 + 0.5;
      
      &::before,
      &::after {
        animation-delay: $delay;
      }
    }
  }
}

@keyframes tail {
  0% {
    width: 0;
  }
  
  30% {
    width: 100px;
  }
  
  100% {
    width: 0;
  }
}

@keyframes shining {
  0% {
    width: 0;
  }
  
  50% {
    width: 30px;
  }
  
  100% {
    width: 0;
  }
}

@keyframes shooting {
  0% {
    transform: translateX(0);
  }
  
  100% {
    transform: translateX(300px);
  }
}

@keyframes sky {
  0% {
    transform: rotate(45deg);
  }
  
  100% {
    transform: rotate(45 + 360deg);
  }
}

styles

<link href="https://fonts.googleapis.com/css?family=Anton" rel="stylesheet" />