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CSS

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JavaScript

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HTML 

              
                <div id="birthday-cake">
  <div class="cake">
    <div class="middle"></div>
    <div class="chocs"></div>
    <div class="top"></div>
  </div>
  <div class="candles">
    <div class="flame"></div>
    <div class="flame2"></div>
    <div class="flame3"></div>
    <div class="text">Happy Birthday!</div>
    <div class="shadows"></div>
  </div>
  <p class="text2">*click on the flame to blow candles</p>
</div>
!

CSS 

              
                body {
  display: flex;
  height:100vh;
  align-items: center;
  justify-content: center;
  background-color: #f07167;
  overflow: hidden;
}

#birthday-cake {
  position: relative;
  top:50px;
  left:0;
}

#birthday-cake:before {
  content:"";
  position: absolute;
  background-color: #ede0d4;
  width: 400px;
  height:140px;
  border-radius:50%;
  left:50%;
  top:50%;
  transform: translate(-50%,-10%);
  box-shadow: inset -2px -5px #e6ccb2;
}

.cake {
  position: absolute;
  background-color: #ddb892;
  width: 350px;
  height:130px;
  transform: translate(-50%,-60%);
}

.cake:before, .cake:after {
  content:"";
  position: absolute;
}

.cake:before, .middle, .middle:before {
  border-radius: 50% 50% 50% 50% / 0% 0% 100% 100%;
  width:350px;
  height:50px;
}

.cake:before {
  background-color: #ddb892;
  top:130px;
}

.cake:after {
  background-color: #b08968;
  width:350px;
  height:30px;
  top:50px;
}

.middle {
  position: absolute;
  background-color: #b08968;
  top:80px;
  z-index:1;
}

.middle:before {
  content:"";
  position: absolute;
  background-color: #ddb892;
  top:-35px;
}

.top {
  position: absolute;
  background-color: #7f5539;
  width:350px;
  height: 90px;
  border-radius:50%;
  z-index:2;
  top:-45px;
  box-shadow: inset -5px -1px #fff, inset -70px 2px rgba(255,255,255,.1);
}

.chocs {
  position: absolute;
  width: 55px;
  height:50px;
  background-color: #7f5539;
  top:0;
  z-index:1;
  border-radius: 50% 50% 50% 50% / 0% 0% 100% 100%;
  box-shadow: 49px 20px #7f5539, 98px 25px #7f5539, 147px 30px #7f5539, 196px 25px #7f5539, 245px 20px #7f5539, 295px 0 #7f5539, 0px 4px #fff, 49px 24px #fff, 98px 29px #fff, 147px 34px #fff, 196px 29px #fff, 245px 24px #fff, 295px 4px #fff;
}

.chocs:before {
  content:"";
  position: absolute;
  width:175px;
  height:180px;
  background-color: rgba(255,255,255,.1);
  border-radius: 100% 0% 100% 0% / 0% 72% 28% 100%;
  left:175px;
  top:0;
}

.candles {
  position: absolute;
  width:30px;
  height: 80px;
  background-color: #0081a7;
  top:-160px;
  left:-20px;
  box-shadow: 50px 20px #0081a7, -50px 20px #0081a7;
}

.candles:before {
  content:"";
  position: absolute;
  width:30px;
  height: 10px;
  background-color: #0081a7;
  border-radius:50%;
  top:-5px;
  box-shadow: 0 80px #0081a7, -50px 20px #0081a7, -50px 100px #0081a7, 50px 20px #0081a7, 50px 100px #0081a7, inset 2px -1px #fff;
}

.candles:after {
  content:"";
  position: absolute;
  width:30px;
  height: 10px;
  border-radius:50%;
  top:15px;
  left:50px;
  box-shadow: inset 2px -1px #fff;
}

.shadows {
  position: absolute;
  width:30px;
  height: 10px;
  border-radius:50%;
  box-shadow: inset 2px -1px #fff;
  left:-50px;
  top:15px;
}

.shadows:before {
  content:"";
  position: absolute;
  background-color: #333;
  width:1.5px;
  height:15px;
  left:14.5px;
  top:-10px;
  box-shadow:50px -20px #333, 100px 0 #333;
}

.shadows:after {
  content:"";
  position: absolute;
  width:15px;
  height:90px;
  left:15px;
  background-color: rgba(255,255,255,.1);
  box-shadow: 50px -20px rgba(255,255,255,.1), 100px 0 rgba(255,255,255,.1);
  border-radius: 0% 100% 50% 50% / 100% 6% 10% 0%;
}


.flame, .flame:before, .flame2, .flame2:before, .flame3, .flame3:before {
  position: absolute;
  border-radius: 80% 15% 55% 50% / 55% 15% 80% 50%;
}

.flame,.flame3, .flame2 {
  cursor: pointer;
  width:30px;
  height: 30px;
  transform: rotate(-45deg);
  z-index:4;
  background-color: rgba(252,191,73,.8);
  transition: .5s;
  animation: flame .5s infinite;
}

.flame {
  top:-40px;
}

.flame2, .flame3 {
  top: -20px;
}

.flame2 {
  left:-50px;
}

.flame3 {
  left: 50px;
}

.flame:before, .flame2:before, .flame3:before {
  content:"";
  background-color: rgba(247,127,0,.4);
  width:20px;
  height:20px;
  top:5px;
  left:5px;
}


@keyframes flame {
  0%, 25%, 100% {transform: scaleY(1) rotate(-45deg);}
  50%, 75% {transform: scaleY(1.1) rotate(-45deg);}
}

.text, .text2 {
  position: absolute;
  color: white;
  font-family: 'Brush Script MT', cursive;
  text-align: center;
}
.text {
  width:350px;
  font-size: 50px;
  left:-140px;
  top:100px;
  z-index:-1;
  transition: .3s;
  opacity:0;
}

.text2 {
  font-size: 25px;
  width: 300px;
  top:105px;
  left:-140px;
}
!

JS 

              
                $(document).ready(function() {
    $(".candles").click(function() {
        
      $(".flame").animate({"opacity": 0}, "fast");
      $(".flame2").animate({"opacity": 0}, "fast");
      $(".flame3").animate({"opacity": 0}, "fast");
      $(".text").animate({"top": -90, "opacity": 1}, "fast");
    });
});
!
999px

Console