CSS多云螺旋动画

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html

css

html, body {
  overflow: hidden;
  background: #3e6fa3;
}

.wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  -moz-perspective: 500px;
  -webkit-perspective: 500px;
  perspective: 500px;
}

i {
  display: block;
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 8px;
  opacity: 0;
  background: rgba(255, 255, 255, 0.5);
  box-shadow: 0px 0px 10px white;
  animation-name: spin;
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
}

i:nth-child(1) {
  -moz-transform: rotate(11.6129deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(11.6129deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(11.6129deg) translate3d(80px, 0, 0);
  transform: rotate(11.6129deg) translate3d(80px, 0, 0);
  animation-delay: 0.04839s;
}

i:nth-child(2) {
  -moz-transform: rotate(23.22581deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(23.22581deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(23.22581deg) translate3d(80px, 0, 0);
  transform: rotate(23.22581deg) translate3d(80px, 0, 0);
  animation-delay: 0.09677s;
}

i:nth-child(3) {
  -moz-transform: rotate(34.83871deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(34.83871deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(34.83871deg) translate3d(80px, 0, 0);
  transform: rotate(34.83871deg) translate3d(80px, 0, 0);
  animation-delay: 0.14516s;
}

i:nth-child(4) {
  -moz-transform: rotate(46.45161deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(46.45161deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(46.45161deg) translate3d(80px, 0, 0);
  transform: rotate(46.45161deg) translate3d(80px, 0, 0);
  animation-delay: 0.19355s;
}

i:nth-child(5) {
  -moz-transform: rotate(58.06452deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(58.06452deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(58.06452deg) translate3d(80px, 0, 0);
  transform: rotate(58.06452deg) translate3d(80px, 0, 0);
  animation-delay: 0.24194s;
}

i:nth-child(6) {
  -moz-transform: rotate(69.67742deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(69.67742deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(69.67742deg) translate3d(80px, 0, 0);
  transform: rotate(69.67742deg) translate3d(80px, 0, 0);
  animation-delay: 0.29032s;
}

i:nth-child(7) {
  -moz-transform: rotate(81.29032deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(81.29032deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(81.29032deg) translate3d(80px, 0, 0);
  transform: rotate(81.29032deg) translate3d(80px, 0, 0);
  animation-delay: 0.33871s;
}

i:nth-child(8) {
  -moz-transform: rotate(92.90323deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(92.90323deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(92.90323deg) translate3d(80px, 0, 0);
  transform: rotate(92.90323deg) translate3d(80px, 0, 0);
  animation-delay: 0.3871s;
}

i:nth-child(9) {
  -moz-transform: rotate(104.51613deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(104.51613deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(104.51613deg) translate3d(80px, 0, 0);
  transform: rotate(104.51613deg) translate3d(80px, 0, 0);
  animation-delay: 0.43548s;
}

i:nth-child(10) {
  -moz-transform: rotate(116.12903deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(116.12903deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(116.12903deg) translate3d(80px, 0, 0);
  transform: rotate(116.12903deg) translate3d(80px, 0, 0);
  animation-delay: 0.48387s;
}

i:nth-child(11) {
  -moz-transform: rotate(127.74194deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(127.74194deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(127.74194deg) translate3d(80px, 0, 0);
  transform: rotate(127.74194deg) translate3d(80px, 0, 0);
  animation-delay: 0.53226s;
}

i:nth-child(12) {
  -moz-transform: rotate(139.35484deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(139.35484deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(139.35484deg) translate3d(80px, 0, 0);
  transform: rotate(139.35484deg) translate3d(80px, 0, 0);
  animation-delay: 0.58065s;
}

i:nth-child(13) {
  -moz-transform: rotate(150.96774deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(150.96774deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(150.96774deg) translate3d(80px, 0, 0);
  transform: rotate(150.96774deg) translate3d(80px, 0, 0);
  animation-delay: 0.62903s;
}

i:nth-child(14) {
  -moz-transform: rotate(162.58065deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(162.58065deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(162.58065deg) translate3d(80px, 0, 0);
  transform: rotate(162.58065deg) translate3d(80px, 0, 0);
  animation-delay: 0.67742s;
}

i:nth-child(15) {
  -moz-transform: rotate(174.19355deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(174.19355deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(174.19355deg) translate3d(80px, 0, 0);
  transform: rotate(174.19355deg) translate3d(80px, 0, 0);
  animation-delay: 0.72581s;
}

i:nth-child(16) {
  -moz-transform: rotate(185.80645deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(185.80645deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(185.80645deg) translate3d(80px, 0, 0);
  transform: rotate(185.80645deg) translate3d(80px, 0, 0);
  animation-delay: 0.77419s;
}

i:nth-child(17) {
  -moz-transform: rotate(197.41935deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(197.41935deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(197.41935deg) translate3d(80px, 0, 0);
  transform: rotate(197.41935deg) translate3d(80px, 0, 0);
  animation-delay: 0.82258s;
}

i:nth-child(18) {
  -moz-transform: rotate(209.03226deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(209.03226deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(209.03226deg) translate3d(80px, 0, 0);
  transform: rotate(209.03226deg) translate3d(80px, 0, 0);
  animation-delay: 0.87097s;
}

i:nth-child(19) {
  -moz-transform: rotate(220.64516deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(220.64516deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(220.64516deg) translate3d(80px, 0, 0);
  transform: rotate(220.64516deg) translate3d(80px, 0, 0);
  animation-delay: 0.91935s;
}

i:nth-child(20) {
  -moz-transform: rotate(232.25806deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(232.25806deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(232.25806deg) translate3d(80px, 0, 0);
  transform: rotate(232.25806deg) translate3d(80px, 0, 0);
  animation-delay: 0.96774s;
}

i:nth-child(21) {
  -moz-transform: rotate(243.87097deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(243.87097deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(243.87097deg) translate3d(80px, 0, 0);
  transform: rotate(243.87097deg) translate3d(80px, 0, 0);
  animation-delay: 1.01613s;
}

i:nth-child(22) {
  -moz-transform: rotate(255.48387deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(255.48387deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(255.48387deg) translate3d(80px, 0, 0);
  transform: rotate(255.48387deg) translate3d(80px, 0, 0);
  animation-delay: 1.06452s;
}

i:nth-child(23) {
  -moz-transform: rotate(267.09677deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(267.09677deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(267.09677deg) translate3d(80px, 0, 0);
  transform: rotate(267.09677deg) translate3d(80px, 0, 0);
  animation-delay: 1.1129s;
}

i:nth-child(24) {
  -moz-transform: rotate(278.70968deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(278.70968deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(278.70968deg) translate3d(80px, 0, 0);
  transform: rotate(278.70968deg) translate3d(80px, 0, 0);
  animation-delay: 1.16129s;
}

i:nth-child(25) {
  -moz-transform: rotate(290.32258deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(290.32258deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(290.32258deg) translate3d(80px, 0, 0);
  transform: rotate(290.32258deg) translate3d(80px, 0, 0);
  animation-delay: 1.20968s;
}

i:nth-child(26) {
  -moz-transform: rotate(301.93548deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(301.93548deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(301.93548deg) translate3d(80px, 0, 0);
  transform: rotate(301.93548deg) translate3d(80px, 0, 0);
  animation-delay: 1.25806s;
}

i:nth-child(27) {
  -moz-transform: rotate(313.54839deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(313.54839deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(313.54839deg) translate3d(80px, 0, 0);
  transform: rotate(313.54839deg) translate3d(80px, 0, 0);
  animation-delay: 1.30645s;
}

i:nth-child(28) {
  -moz-transform: rotate(325.16129deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(325.16129deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(325.16129deg) translate3d(80px, 0, 0);
  transform: rotate(325.16129deg) translate3d(80px, 0, 0);
  animation-delay: 1.35484s;
}

i:nth-child(29) {
  -moz-transform: rotate(336.77419deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(336.77419deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(336.77419deg) translate3d(80px, 0, 0);
  transform: rotate(336.77419deg) translate3d(80px, 0, 0);
  animation-delay: 1.40323s;
}

i:nth-child(30) {
  -moz-transform: rotate(348.3871deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(348.3871deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(348.3871deg) translate3d(80px, 0, 0);
  transform: rotate(348.3871deg) translate3d(80px, 0, 0);
  animation-delay: 1.45161s;
}

i:nth-child(31) {
  -moz-transform: rotate(360deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(360deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(360deg) translate3d(80px, 0, 0);
  transform: rotate(360deg) translate3d(80px, 0, 0);
  animation-delay: 1.5s;
}

i:nth-child(32) {
  -moz-transform: rotate(371.6129deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(371.6129deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(371.6129deg) translate3d(80px, 0, 0);
  transform: rotate(371.6129deg) translate3d(80px, 0, 0);
  animation-delay: 1.54839s;
}

i:nth-child(33) {
  -moz-transform: rotate(383.22581deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(383.22581deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(383.22581deg) translate3d(80px, 0, 0);
  transform: rotate(383.22581deg) translate3d(80px, 0, 0);
  animation-delay: 1.59677s;
}

i:nth-child(34) {
  -moz-transform: rotate(394.83871deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(394.83871deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(394.83871deg) translate3d(80px, 0, 0);
  transform: rotate(394.83871deg) translate3d(80px, 0, 0);
  animation-delay: 1.64516s;
}

i:nth-child(35) {
  -moz-transform: rotate(406.45161deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(406.45161deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(406.45161deg) translate3d(80px, 0, 0);
  transform: rotate(406.45161deg) translate3d(80px, 0, 0);
  animation-delay: 1.69355s;
}

i:nth-child(36) {
  -moz-transform: rotate(418.06452deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(418.06452deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(418.06452deg) translate3d(80px, 0, 0);
  transform: rotate(418.06452deg) translate3d(80px, 0, 0);
  animation-delay: 1.74194s;
}

i:nth-child(37) {
  -moz-transform: rotate(429.67742deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(429.67742deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(429.67742deg) translate3d(80px, 0, 0);
  transform: rotate(429.67742deg) translate3d(80px, 0, 0);
  animation-delay: 1.79032s;
}

i:nth-child(38) {
  -moz-transform: rotate(441.29032deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(441.29032deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(441.29032deg) translate3d(80px, 0, 0);
  transform: rotate(441.29032deg) translate3d(80px, 0, 0);
  animation-delay: 1.83871s;
}

i:nth-child(39) {
  -moz-transform: rotate(452.90323deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(452.90323deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(452.90323deg) translate3d(80px, 0, 0);
  transform: rotate(452.90323deg) translate3d(80px, 0, 0);
  animation-delay: 1.8871s;
}

i:nth-child(40) {
  -moz-transform: rotate(464.51613deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(464.51613deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(464.51613deg) translate3d(80px, 0, 0);
  transform: rotate(464.51613deg) translate3d(80px, 0, 0);
  animation-delay: 1.93548s;
}

i:nth-child(41) {
  -moz-transform: rotate(476.12903deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(476.12903deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(476.12903deg) translate3d(80px, 0, 0);
  transform: rotate(476.12903deg) translate3d(80px, 0, 0);
  animation-delay: 1.98387s;
}

i:nth-child(42) {
  -moz-transform: rotate(487.74194deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(487.74194deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(487.74194deg) translate3d(80px, 0, 0);
  transform: rotate(487.74194deg) translate3d(80px, 0, 0);
  animation-delay: 2.03226s;
}

i:nth-child(43) {
  -moz-transform: rotate(499.35484deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(499.35484deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(499.35484deg) translate3d(80px, 0, 0);
  transform: rotate(499.35484deg) translate3d(80px, 0, 0);
  animation-delay: 2.08065s;
}

i:nth-child(44) {
  -moz-transform: rotate(510.96774deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(510.96774deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(510.96774deg) translate3d(80px, 0, 0);
  transform: rotate(510.96774deg) translate3d(80px, 0, 0);
  animation-delay: 2.12903s;
}

i:nth-child(45) {
  -moz-transform: rotate(522.58065deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(522.58065deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(522.58065deg) translate3d(80px, 0, 0);
  transform: rotate(522.58065deg) translate3d(80px, 0, 0);
  animation-delay: 2.17742s;
}

i:nth-child(46) {
  -moz-transform: rotate(534.19355deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(534.19355deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(534.19355deg) translate3d(80px, 0, 0);
  transform: rotate(534.19355deg) translate3d(80px, 0, 0);
  animation-delay: 2.22581s;
}

i:nth-child(47) {
  -moz-transform: rotate(545.80645deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(545.80645deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(545.80645deg) translate3d(80px, 0, 0);
  transform: rotate(545.80645deg) translate3d(80px, 0, 0);
  animation-delay: 2.27419s;
}

i:nth-child(48) {
  -moz-transform: rotate(557.41935deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(557.41935deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(557.41935deg) translate3d(80px, 0, 0);
  transform: rotate(557.41935deg) translate3d(80px, 0, 0);
  animation-delay: 2.32258s;
}

i:nth-child(49) {
  -moz-transform: rotate(569.03226deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(569.03226deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(569.03226deg) translate3d(80px, 0, 0);
  transform: rotate(569.03226deg) translate3d(80px, 0, 0);
  animation-delay: 2.37097s;
}

i:nth-child(50) {
  -moz-transform: rotate(580.64516deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(580.64516deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(580.64516deg) translate3d(80px, 0, 0);
  transform: rotate(580.64516deg) translate3d(80px, 0, 0);
  animation-delay: 2.41935s;
}

i:nth-child(51) {
  -moz-transform: rotate(592.25806deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(592.25806deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(592.25806deg) translate3d(80px, 0, 0);
  transform: rotate(592.25806deg) translate3d(80px, 0, 0);
  animation-delay: 2.46774s;
}

i:nth-child(52) {
  -moz-transform: rotate(603.87097deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(603.87097deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(603.87097deg) translate3d(80px, 0, 0);
  transform: rotate(603.87097deg) translate3d(80px, 0, 0);
  animation-delay: 2.51613s;
}

i:nth-child(53) {
  -moz-transform: rotate(615.48387deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(615.48387deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(615.48387deg) translate3d(80px, 0, 0);
  transform: rotate(615.48387deg) translate3d(80px, 0, 0);
  animation-delay: 2.56452s;
}

i:nth-child(54) {
  -moz-transform: rotate(627.09677deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(627.09677deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(627.09677deg) translate3d(80px, 0, 0);
  transform: rotate(627.09677deg) translate3d(80px, 0, 0);
  animation-delay: 2.6129s;
}

i:nth-child(55) {
  -moz-transform: rotate(638.70968deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(638.70968deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(638.70968deg) translate3d(80px, 0, 0);
  transform: rotate(638.70968deg) translate3d(80px, 0, 0);
  animation-delay: 2.66129s;
}

i:nth-child(56) {
  -moz-transform: rotate(650.32258deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(650.32258deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(650.32258deg) translate3d(80px, 0, 0);
  transform: rotate(650.32258deg) translate3d(80px, 0, 0);
  animation-delay: 2.70968s;
}

i:nth-child(57) {
  -moz-transform: rotate(661.93548deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(661.93548deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(661.93548deg) translate3d(80px, 0, 0);
  transform: rotate(661.93548deg) translate3d(80px, 0, 0);
  animation-delay: 2.75806s;
}

i:nth-child(58) {
  -moz-transform: rotate(673.54839deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(673.54839deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(673.54839deg) translate3d(80px, 0, 0);
  transform: rotate(673.54839deg) translate3d(80px, 0, 0);
  animation-delay: 2.80645s;
}

i:nth-child(59) {
  -moz-transform: rotate(685.16129deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(685.16129deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(685.16129deg) translate3d(80px, 0, 0);
  transform: rotate(685.16129deg) translate3d(80px, 0, 0);
  animation-delay: 2.85484s;
}

i:nth-child(60) {
  -moz-transform: rotate(696.77419deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(696.77419deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(696.77419deg) translate3d(80px, 0, 0);
  transform: rotate(696.77419deg) translate3d(80px, 0, 0);
  animation-delay: 2.90323s;
}

i:nth-child(61) {
  -moz-transform: rotate(708.3871deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(708.3871deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(708.3871deg) translate3d(80px, 0, 0);
  transform: rotate(708.3871deg) translate3d(80px, 0, 0);
  animation-delay: 2.95161s;
}

i:nth-child(62) {
  -moz-transform: rotate(720deg) translate3d(80px, 0, 0);
  -ms-transform: rotate(720deg) translate3d(80px, 0, 0);
  -webkit-transform: rotate(720deg) translate3d(80px, 0, 0);
  transform: rotate(720deg) translate3d(80px, 0, 0);
  animation-delay: 3s;
}

@keyframes spin {
  from {
    opacity: 0.0;
  }
  to {
    opacity: 0.6;
    transform: translate3d(-4px, -4px, 570px);
  }
}
#black {
  position: absolute;
  left: 10px;
  bottom: 10px;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
}
#black:after {
  content: 'Black & white';
}

#black:target {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  background: #111;
  cursor: default;
}
#black:target:after {
  content: '';
}

JavaScript

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