.attention Please take touch
.container
  - for (i = 0; i < 200; i++)
    .trigger
  .monitor
    - for (i = 0; i < 10; i++)
      .ball

body {
  background: #000;
  height: 100vh;
  overflow: hidden;
  cursor: pointer;
}

.attention {
  position: absolute;
  z-index: 999;
  top: 50%;
  left: 50%;
  color: #fff;
  font-size: 20px;
  font-weight: light;
  font-family: 'Quicksand', sans-serif;
  letter-spacing: 10px;
  white-space: nowrap;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation:
    attention 8000ms linear forwards,
    fade 8000ms linear forwards;
}

.container {
  position: relative;
  display: grid;
  grid-template-rows: repeat(10, 10vh);
  grid-template-columns: repeat(20, 5vw);
}

.trigger {
  @for $i from 1 through 10 {
    @for $j from 1 through 20 {
      $key: ($i - 1) * 20 + $j;
      &:nth-child(#{$key}) {
        &:hover ~ .monitor .ball {
          top: ($i - 1) * 10% + 5%;
          left: ($j - 1) * 5% + 2.5%;
        }
      }
    }
  }
}

.monitor {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #000;
  pointer-events: none;
  filter: blur(10px) contrast(30);
}

.ball {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 300px;
  // background: #fff;
  border-radius: 100%;
  transform: translate(-50%, -50%);
  transition-timing-function: cubic-bezier(0.330, 1.700, 0.510, 0.820);
  mix-blend-mode: screen;
  
  border: 10px solid #fff;
  
  @for $i from 1 through 10 {
    &:nth-child(#{$i}) {
      width: $i * 50 + 20px;
      height: $i * 50 + 20px;
      transition-duration: 300ms + 200ms * $i;
      animation: rotate random(600000) + 600000ms -1200000ms linear infinite;
      // background: rgba(random(255), 255, 255, 1);
      border-color: rgba(random(100) + 200, 255, 255, 1);
      border-top-width: random(6) + 5px;
      border-right-width: random(6) + 5px;
      border-bottom-width: random(6) + 5px;
      border-left-width: random(6) + 5px;
      
      &::before {
        width: random(20) + 10px;
        height: random(20) + 10px;
        animation: slide random(10000) + 10000ms -20000ms ease-in-out infinite alternate;
      }
    }
  }
  
  &::before {
    content: '';
    position: absolute;
    background: #fff;
    border-radius: 100%;
  }
}

@keyframes rotate {
  0% {
    transform: translate(-50%, -50%) rotateZ(0deg);
  }
  
  100% {
    transform: translate(-50%, -50%) rotateZ(360deg);
  }
}

@keyframes slide {
  0% {
    transform: translateX(-150px);
  }
  
  100% {
    transform: translateX(300px);
  }
}

@keyframes attention {
  0% {
    letter-spacing: 10px;
  }
  
  100% {
    letter-spacing: 40px;
  }
}

@keyframes fade {
  0% {
    opacity: 0;
  }
  
  30% {
    opacity: 1;
  }
  
  100% {    
    opacity: 0;
  }
}