let_it_snow.css

.let-it-snow { position: relative }

.lis-flake,
.lis-flake--js {
  position: absolute;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 4px #fff
}

.lis-flake--js { opacity: .2 }

.lis-flake--stuck {
  position: absolute;
  background: #fff;
  border-radius: 50%;
  opacity: .7;
  transition: all .3s ease
}

.lis-flake:nth-child(-n+33) {
  z-index: 3000;
  -moz-animation: snow1 8s linear infinite;
  -webkit-animation: snow1 8s linear infinite;
  animation: snow1 8s linear infinite
}

.lis-flake:nth-child(n+33) {
  -moz-animation: snow2 8s 4s linear infinite;
  -webkit-animation: snow2 8s 4s linear infinite;
  animation: snow2 8s 4s linear infinite
}

.lis-flake:nth-child(n+66) {
  -moz-animation: snow3 8s 6s linear infinite;
  -webkit-animation: snow3 8s 6s linear infinite;
  animation: snow3 8s 6s linear infinite
}

.lis-flake:nth-child(1) {
  z-index: 3000;
  left: 79%;
  top: -210px;
  width: 4px;
  height: 5px;
  transform: rotate(39deg)
}

.lis-flake:nth-child(2) {
  left: 12%;
  top: -500px;
  width: 6px;
  height: 5px;
  transform: rotate(58deg)
}

.lis-flake:nth-child(3) {
  left: 6%;
  top: -40px;
  width: 2px;
  height: 5px;
  transform: rotate(2deg)
}

.lis-flake:nth-child(4) {
  left: 35%;
  top: -340px;
  width: 3px;
  height: 3px;
  transform: rotate(17deg)
}

.lis-flake:nth-child(5) {
  z-index: 3000;
  left: 34%;
  top: -680px;
  width: 2px;
  height: 5px;
  transform: rotate(92deg)
}

.lis-flake:nth-child(6) {
  left: 9%;
  top: -780px;
  width: 1px;
  height: 2px;
  transform: rotate(26deg)
}

.lis-flake:nth-child(7) {
  z-index: 3000;
  left: 27%;
  top: -340px;
  width: 2px;
  height: 1px;
  transform: rotate(8deg)
}

.lis-flake:nth-child(8) {
  left: 12%;
  top: -310px;
  width: 6px;
  height: 4px;
  transform: rotate(80deg)
}

.lis-flake:nth-child(9) {
  left: 21%;
  top: -100px;
  width: 5px;
  height: 1px;
  transform: rotate(53deg)
}

.lis-flake:nth-child(10) {
  z-index: 3000;
  left: 30%;
  top: -690px;
  width: 3px;
  height: 1px;
  transform: rotate(74deg)
}

.lis-flake:nth-child(11) {
  left: 23%;
  top: -920px;
  width: 4px;
  height: 4px;
  transform: rotate(69deg)
}

.lis-flake:nth-child(12) {
  z-index: 3000;
  left: 37%;
  top: -870px;
  width: 3px;
  height: 3px;
  transform: rotate(26deg)
}

.lis-flake:nth-child(13) {
  left: 36%;
  top: -570px;
  width: 5px;
  height: 6px;
  transform: rotate(47deg)
}

.lis-flake:nth-child(14) {
  left: 78%;
  top: -730px;
  width: 5px;
  height: 3px;
  transform: rotate(95deg)
}

.lis-flake:nth-child(15) {
  left: 3%;
  top: -840px;
  width: 3px;
  height: 2px;
  transform: rotate(54deg)
}

.lis-flake:nth-child(16) {
  z-index: 3000;
  left: 34%;
  top: -960px;
  width: 2px;
  height: 3px;
  transform: rotate(56deg)
}

.lis-flake:nth-child(17) {
  left: 7%;
  top: -660px;
  width: 4px;
  height: 1px;
  transform: rotate(3deg)
}

.lis-flake:nth-child(18) {
  z-index: 3000;
  left: 16%;
  top: -510px;
  width: 5px;
  height: 5px;
  transform: rotate(75deg)
}

.lis-flake:nth-child(19) {
  left: 77%;
  top: -760px;
  width: 3px;
  height: 1px;
  transform: rotate(77deg)
}

.lis-flake:nth-child(20) {
  z-index: 3000;
  left: 98%;
  top: -240px;
  width: 4px;
  height: 1px;
  transform: rotate(18deg)
}

.lis-flake:nth-child(21) {
  left: 71%;
  top: -540px;
  width: 6px;
  height: 5px;
  transform: rotate(65deg)
}

.lis-flake:nth-child(22) {
  left: 64%;
  top: -650px;
  width: 2px;
  height: 5px;
  transform: rotate(96deg)
}

.lis-flake:nth-child(23) {
  left: 65%;
  top: -70px;
  width: 1px;
  height: 3px;
  transform: rotate(94deg)
}

.lis-flake:nth-child(24) {
  left: 76%;
  top: -970px;
  width: 3px;
  height: 4px;
  transform: rotate(63deg)
}

.lis-flake:nth-child(25) {
  left: 79%;
  top: -830px;
  width: 3px;
  height: 4px;
  transform: rotate(86deg)
}

.lis-flake:nth-child(26) {
  left: 18%;
  top: -540px;
  width: 2px;
  height: 5px;
  transform: rotate(60deg)
}

.lis-flake:nth-child(27) {
  left: 99%;
  top: -500px;
  width: 6px;
  height: 6px;
  transform: rotate(28deg)
}

.lis-flake:nth-child(28) {
  left: 5%;
  top: -270px;
  width: 6px;
  height: 3px;
  transform: rotate(57deg)
}

.lis-flake:nth-child(29) {
  left: 64%;
  top: -630px;
  width: 5px;
  height: 3px;
  transform: rotate(24deg)
}

.lis-flake:nth-child(30) {
  left: 4%;
  top: -130px;
  width: 4px;
  height: 1px;
  transform: rotate(70deg)
}

.lis-flake:nth-child(31) {
  left: 59%;
  top: -340px;
  width: 4px;
  height: 6px;
  transform: rotate(65deg)
}

.lis-flake:nth-child(32) {
  left: 44%;
  top: -100px;
  width: 1px;
  height: 6px;
  transform: rotate(49deg)
}

.lis-flake:nth-child(33) {
  left: 15%;
  top: -870px;
  width: 2px;
  height: 6px;
  transform: rotate(38deg)
}

.lis-flake:nth-child(34) {
  left: 76%;
  top: -490px;
  width: 2px;
  height: 5px;
  transform: rotate(65deg)
}

.lis-flake:nth-child(35) {
  left: 93%;
  top: -320px;
  width: 1px;
  height: 5px;
  transform: rotate(23deg)
}

.lis-flake:nth-child(36) {
  left: 4%;
  top: -620px;
  width: 5px;
  height: 5px;
  transform: rotate(19deg)
}

.lis-flake:nth-child(37) {
  left: 35%;
  top: -910px;
  width: 5px;
  height: 4px;
  transform: rotate(66deg)
}

.lis-flake:nth-child(38) {
  left: 90%;
  top: -460px;
  width: 4px;
  height: 1px;
  transform: rotate(36deg)
}

.lis-flake:nth-child(39) {
  left: 36%;
  top: -340px;
  width: 1px;
  height: 1px;
  transform: rotate(1deg)
}

.lis-flake:nth-child(40) {
  left: 89%;
  top: -170px;
  width: 6px;
  height: 5px;
  transform: rotate(65deg)
}

.lis-flake:nth-child(41) {
  left: 87%;
  top: -330px;
  width: 6px;
  height: 6px;
  transform: rotate(48deg)
}

.lis-flake:nth-child(42) {
  left: 63%;
  top: -520px;
  width: 4px;
  height: 1px;
  transform: rotate(100deg)
}

.lis-flake:nth-child(43) {
  left: 54%;
  top: -480px;
  width: 4px;
  height: 4px;
  transform: rotate(69deg)
}

.lis-flake:nth-child(44) {
  left: 4%;
  top: -290px;
  width: 4px;
  height: 5px;
  transform: rotate(89deg)
}

.lis-flake:nth-child(45) {
  left: 19%;
  top: -430px;
  width: 2px;
  height: 6px;
  transform: rotate(73deg)
}

.lis-flake:nth-child(46) {
  left: 18%;
  top: -290px;
  width: 6px;
  height: 5px;
  transform: rotate(95deg)
}

.lis-flake:nth-child(47) {
  left: 65%;
  top: -680px;
  width: 5px;
  height: 3px;
  transform: rotate(100deg)
}

.lis-flake:nth-child(48) {
  left: 21%;
  top: -390px;
  width: 2px;
  height: 4px;
  transform: rotate(70deg)
}

.lis-flake:nth-child(49) {
  left: 63%;
  top: -600px;
  width: 4px;
  height: 2px;
  transform: rotate(44deg)
}

.lis-flake:nth-child(50) {
  left: 34%;
  top: -10px;
  width: 6px;
  height: 3px;
  transform: rotate(68deg)
}

.lis-flake:nth-child(51) {
  left: 91%;
  top: -400px;
  width: 2px;
  height: 6px;
  transform: rotate(97deg)
}

.lis-flake:nth-child(52) {
  left: 1%;
  top: -740px;
  width: 4px;
  height: 2px;
  transform: rotate(8deg)
}

.lis-flake:nth-child(53) {
  left: 28%;
  top: -160px;
  width: 2px;
  height: 5px;
  transform: rotate(45deg)
}

.lis-flake:nth-child(54) {
  left: 28%;
  top: -170px;
  width: 2px;
  height: 4px;
  transform: rotate(84deg)
}

.lis-flake:nth-child(55) {
  left: 71%;
  top: -710px;
  width: 5px;
  height: 5px;
  transform: rotate(80deg)
}

.lis-flake:nth-child(56) {
  left: 61%;
  top: -120px;
  width: 5px;
  height: 1px;
  transform: rotate(96deg)
}

.lis-flake:nth-child(57) {
  left: 94%;
  top: -90px;
  width: 2px;
  height: 2px;
  transform: rotate(73deg)
}

.lis-flake:nth-child(58) {
  left: 83%;
  top: 0px;
  width: 2px;
  height: 5px;
  transform: rotate(48deg)
}

.lis-flake:nth-child(59) {
  left: 88%;
  top: -430px;
  width: 4px;
  height: 5px;
  transform: rotate(1deg)
}

.lis-flake:nth-child(60) {
  left: 33%;
  top: -30px;
  width: 6px;
  height: 5px;
  transform: rotate(36deg)
}

.lis-flake:nth-child(61) {
  left: 50%;
  top: -790px;
  width: 6px;
  height: 4px;
  transform: rotate(5deg)
}

.lis-flake:nth-child(62) {
  left: 32%;
  top: -960px;
  width: 2px;
  height: 4px;
  transform: rotate(45deg)
}

.lis-flake:nth-child(63) {
  left: 79%;
  top: -880px;
  width: 3px;
  height: 4px;
  transform: rotate(23deg)
}

.lis-flake:nth-child(64) {
  left: 13%;
  top: -10px;
  width: 4px;
  height: 4px;
  transform: rotate(9deg)
}

.lis-flake:nth-child(65) {
  left: 92%;
  top: -340px;
  width: 4px;
  height: 4px;
  transform: rotate(30deg)
}

.lis-flake:nth-child(66) {
  left: 26%;
  top: -210px;
  width: 6px;
  height: 2px;
  transform: rotate(29deg)
}

.lis-flake:nth-child(67) {
  left: 77%;
  top: -590px;
  width: 1px;
  height: 6px;
  transform: rotate(13deg)
}

.lis-flake:nth-child(68) {
  left: 15%;
  top: -70px;
  width: 5px;
  height: 3px;
  transform: rotate(37deg)
}

.lis-flake:nth-child(69) {
  left: 71%;
  top: -180px;
  width: 6px;
  height: 4px;
  transform: rotate(60deg)
}

.lis-flake:nth-child(70) {
  left: 41%;
  top: -930px;
  width: 2px;
  height: 5px;
  transform: rotate(94deg)
}

.lis-flake:nth-child(71) {
  left: 93%;
  top: -870px;
  width: 5px;
  height: 3px;
  transform: rotate(42deg)
}

.lis-flake:nth-child(72) {
  left: 54%;
  top: -470px;
  width: 1px;
  height: 5px;
  transform: rotate(90deg)
}

.lis-flake:nth-child(73) {
  left: 31%;
  top: -520px;
  width: 3px;
  height: 5px;
  transform: rotate(42deg)
}

.lis-flake:nth-child(74) {
  left: 18%;
  top: -810px;
  width: 5px;
  height: 3px;
  transform: rotate(8deg)
}

.lis-flake:nth-child(75) {
  left: 12%;
  top: -660px;
  width: 3px;
  height: 4px;
  transform: rotate(64deg)
}

.lis-flake:nth-child(76) {
  left: 17%;
  top: -860px;
  width: 5px;
  height: 6px;
  transform: rotate(73deg)
}

.lis-flake:nth-child(77) {
  left: 82%;
  top: -690px;
  width: 1px;
  height: 4px;
  transform: rotate(68deg)
}

.lis-flake:nth-child(78) {
  left: 8%;
  top: -850px;
  width: 4px;
  height: 5px;
  transform: rotate(30deg)
}

.lis-flake:nth-child(79) {
  left: 19%;
  top: -420px;
  width: 5px;
  height: 2px;
  transform: rotate(100deg)
}

.lis-flake:nth-child(80) {
  left: 7%;
  top: -810px;
  width: 5px;
  height: 1px;
  transform: rotate(68deg)
}

.lis-flake:nth-child(81) {
  left: 18%;
  top: -450px;
  width: 2px;
  height: 4px;
  transform: rotate(82deg)
}

.lis-flake:nth-child(82) {
  left: 26%;
  top: -900px;
  width: 5px;
  height: 3px;
  transform: rotate(26deg)
}

.lis-flake:nth-child(83) {
  left: 86%;
  top: -590px;
  width: 1px;
  height: 2px;
  transform: rotate(73deg)
}

.lis-flake:nth-child(84) {
  left: 72%;
  top: -230px;
  width: 2px;
  height: 2px;
  transform: rotate(55deg)
}

.lis-flake:nth-child(85) {
  left: 26%;
  top: -700px;
  width: 6px;
  height: 3px;
  transform: rotate(11deg)
}

.lis-flake:nth-child(86) {
  left: 46%;
  top: -840px;
  width: 2px;
  height: 2px;
  transform: rotate(100deg)
}

.lis-flake:nth-child(87) {
  left: 5%;
  top: -600px;
  width: 4px;
  height: 3px;
  transform: rotate(46deg)
}

.lis-flake:nth-child(88) {
  left: 6%;
  top: -610px;
  width: 6px;
  height: 4px;
  transform: rotate(65deg)
}

.lis-flake:nth-child(89) {
  left: 45%;
  top: -420px;
  width: 3px;
  height: 5px;
  transform: rotate(80deg)
}

.lis-flake:nth-child(90) {
  left: 45%;
  top: -100px;
  width: 6px;
  height: 1px;
  transform: rotate(33deg)
}

.lis-flake:nth-child(91) {
  left: 6%;
  top: -830px;
  width: 3px;
  height: 6px;
  transform: rotate(4deg)
}

.lis-flake:nth-child(92) {
  left: 58%;
  top: -770px;
  width: 1px;
  height: 3px;
  transform: rotate(89deg)
}

.lis-flake:nth-child(93) {
  left: 23%;
  top: -870px;
  width: 4px;
  height: 6px;
  transform: rotate(32deg)
}

.lis-flake:nth-child(94) {
  left: 89%;
  top: -340px;
  width: 6px;
  height: 4px;
  transform: rotate(7deg)
}

.lis-flake:nth-child(95) {
  left: 46%;
  top: -790px;
  width: 4px;
  height: 2px;
  transform: rotate(91deg)
}

.lis-flake:nth-child(96) {
  left: 94%;
  top: -140px;
  width: 6px;
  height: 5px;
  transform: rotate(22deg)
}

.lis-flake:nth-child(97) {
  left: 32%;
  top: -430px;
  width: 3px;
  height: 1px;
  transform: rotate(55deg)
}

.lis-flake:nth-child(98) {
  left: 85%;
  top: -40px;
  width: 6px;
  height: 1px;
  transform: rotate(64deg)
}

.lis-flake:nth-child(99) {
  left: 66%;
  top: -710px;
  width: 1px;
  height: 1px;
  transform: rotate(42deg)
}

.lis-flake:nth-child(100) {
  left: 33%;
  top: -790px;
  width: 1px;
  height: 4px;
  transform: rotate(55deg)
}
@-moz-keyframes 
snow1 { 0% {
-moz-transform:translate(-250px, 0);
opacity:1
}
100% {
-moz-transform:translate(250px, 1500px);
opacity:0
}
}
@-moz-keyframes 
snow2 { 0% {
-moz-transform:translate(0, 0);
opacity:1
}
100% {
-moz-transform:translate(250px, 2500px);
opacity:.5
}
}
@-moz-keyframes 
snow3 { 0% {
-moz-transform:translate(0, 0);
opacity:1
}
100% {
-moz-transform:translate(0, 2500px);
opacity:.5
}
}
@-webkit-keyframes 
snow1 { 0% {
-webkit-transform:translate(-250px, 0);
opacity:1
}
100% {
-webkit-transform:translate(250px, 1500px);
opacity:0
}
}
@-webkit-keyframes 
snow2 { 0% {
-webkit-transform:translate(0, 0);
opacity:1
}
100% {
-webkit-transform:translate(250px, 2500px);
opacity:.5
}
}
@-webkit-keyframes 
snow3 { 0% {
-webkit-transform:translate(0, 0);
opacity:1
}
100% {
-webkit-transform:translate(0, 2500px);
opacity:.5
}
}
@keyframes 
snow1 { 0% {
transform:translate(-250px, 0);
opacity:1
}
100% {
transform:translate(250px, 1500px);
opacity:0
}
}
@keyframes 
snow2 { 0% {
transform:translate(0, 0);
opacity:1
}
100% {
transform:translate(250px, 2500px);
opacity:.5
}
}
@keyframes 
snow3 { 0% {
transform:translate(0, 0);
opacity:1
}
100% {
transform:translate(0, 2500px);
opacity:.5
}
}
/*# sourceMappingURL=let-it-snow.css.map */

let_it_snow.js

!function(a){a.letItSnow=function(b,c){var d=this;d.$el=a(b),d.el=b,d.$el.data("LetItSnow",d),d.init=function(){if(d.options=a.extend({},a.letItSnow.defaultOptions,c),1==d.options.makeFlakes)for(var b=0;100>b;b++)d.$el.prepend('<span class="lis-flake"></span>');1==d.options.sticky&&(d.makeFlakes(),setInterval(function(){d.makeFlakes()},7e3))},d.makeFlakes=function(){a(".lis-flake--js").remove();for(var b=0;50>b;b++)d.$el.append('<span class="'+d.options.stickyFlakes+'"></span>');var c=a("."+d.options.stickyFlakes);d.animateFlakes(c)};var e=d.$el.find("[collectsnow]");if(e.length)var f=e.offset().top,g=e.offset().left,h=a(window).width()-(g+e.outerWidth());d.animateFlakes=function(b){var c=function(a,b){return Math.floor(Math.random()*(b-a+1))+a},d=0;b.each(function(){function b(b){i.animate({marginTop:"2500px"},{duration:b,step:function(b){if(e.length){var c=Math.round(b),d=a(window).width()-(i.offset().left+i.outerWidth());j+c>=f-10&&f+10>=j+c&&i.css("left").replace(/[^-\d\.]/g,"")>=g&&d>=h&&i.stop().attr("class","lis-flake--stuck").css({width:"3px",height:"3px",top:j+6+"px"})}}})}var i=a(this),j=10*c(0,100)-1e3;d++;var k={left:c(0,100)+"%",top:j+"px",width:c(0,5)+"px",height:c(0,5)+"px",transform:"rotate"+(c(0,100)+"deg")};i.css(k),i.hasClass("lis-flake--stuck")||(16>=d?b(1e4):d>17&&33>=d?setTimeout(function(){b(8e3)},4e3):d>34&&50>d&&setTimeout(function(){b(8e3)},6e3))})},d.init()},a.letItSnow.defaultOptions={stickyFlakes:"lis-flake--js",makeFlakes:!0,sticky:!0},a.fn.letItSnow=function(b){return this.each(function(){new a.letItSnow(this,b)})}}(jQuery);