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HTML 

              
                <!-- 
autor: Marco Barría 
https://twitter.com/marco_bf
-->

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	c-7.606-0.447-2.954-31.5-19.243-18.899c-7.985,6.177-17.658-5.969-27.377,5.732C118.88,434.066,121.38,417.067,111.547,413.9z
                          ;
                          M111.547,415.233c-6.667-0.834-9.667,4.667-13.833,3.333c-19.649-6.291-8.158,22.176-14.5,22.334
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                          " />
    </path>
    <rect x="10" y="475.571" fill="#fefae9" width="180" height="4" />
</svg>
<div class="text">
  <h1>happy birthday!</h1>
  <p>Poly</p>
</div>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Lato:300italic);

html,
body {
  width: 100%;
  height: 100%;
}

body {
  background: #ee9ca7;
}

#cake {
  display: block;
  position: relative;
  margin: -10em auto 0 auto;
}

/* ============================================== Candle
*/

.velas {
  background: #ffffff;
  border-radius: 10px;
  position: absolute;
  top: 228px;
  left: 50%;
  margin-left: -2.4px;
  margin-top: -8.33333333px;
  width: 5px;
  height: 35px;
  transform: translateY(-300px);
  backface-visibility: hidden;
  animation: in 500ms 6s ease-out forwards;
}
.velas:after,
.velas:before {
  background: rgba(255, 0, 0, 0.4);
  content: "";
  position: absolute;
  width: 100%;
  height: 2.22222222px;
}
.velas:after {
  top: 25%;
  left: 0;
}
.velas:before {
  top: 45%;
  left: 0;
}

/* ============================================== Fire
*/

.fuego {
  border-radius: 100%;
  position: absolute;
  top: -20px;
  left: 50%;
  margin-left: -2.6px;
  width: 6.66666667px;
  height: 18px;
}
.fuego:nth-child(1) {
  animation: fuego 2s 6.5s infinite;
}
.fuego:nth-child(2) {
  animation: fuego 1.5s 6.5s infinite;
}
.fuego:nth-child(3) {
  animation: fuego 1s 6.5s infinite;
}
.fuego:nth-child(4) {
  animation: fuego 0.5s 6.5s infinite;
}
.fuego:nth-child(5) {
  animation: fuego 0.2s 6.5s infinite;
}

/* ============================================== Animation Fire
*/

@keyframes fuego {
  0%, 100% {
    background: rgba(254, 248, 97, 0.5);
    box-shadow: 0 0 40px 10px rgba(248, 233, 209, 0.2);
    transform: translateY(0) scale(1);
  }
  50% {
    background: rgba(255, 50, 0, 0.1);
    box-shadow: 0 0 40px 20px rgba(248, 233, 209, 0.2);
    transform: translateY(-20px) scale(0);
  }
}

@keyframes in {
  to {
    transform: translateY(0);
  }
}

.text {
  color: #8b6a60;
  font-family: 'Lato', sans-serif;
  font-weight: 300;
  font-style:italic;
  text-align: center;
  h1 {
    font-size: 1.4em;
  }
}
!

JS 

              
                // I am going to continue to improve this...
// I attempt to perform candle again but could not overcome the previous version.
// https://codepen.io/fixcl/pen/nKFDr
!
999px

Console