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HTML 

              
                <section class="main-content">
  <div class="avocode-wrap">
    <h2 class="title title-1">Happiness is</h2>

    <h2 class="title title-2">...when your code runs without error.</h2>

    <div class="egg smile">
      <div class="face">
        <span class="eye left"></span>
        <span class="eye right"></span>
        <span class="mouth"></span>
      </div>
      <div class="line">
        <span></span>
        <span></span>
      </div>
    </div>
    <div class="egg happy">
      <div class="face">
        <span class="eye left"></span>
        <span class="eye right"></span>
        <span class="mouth"></span>
      </div>
      <span class="face-shadow"></span>
      <div class="line">
        <span></span>
        <span></span>
      </div>
      <div class="line line1">
        <span></span>
        <span></span>
      </div>
    </div>
    <div class="star star2"></div>
    <div class="star star4"></div>
    <div class="sparkle">
      <div class="circle-1"></div>
      <div class="circle-2"></div>
    </div>
    <div class="sparkle sparkle-2">
      <div class="circle-1"></div>
      <div class="circle-2"></div>
    </div>
    <div class="sparkle sparkle-3">
      <div class="circle-1"></div>
      <div class="circle-2"></div>
    </div>
    <div class="sparkle sparkle-4">
      <div class="circle-1"></div>
      <div class="circle-2"></div>
    </div>
    <div class="sparkle sparkle-5">
      <div class="circle-1"></div>
      <div class="circle-2"></div>
    </div>
    <div class="plus plus-1"></div>
    <div class="plus plus-2"> </div>
    <div class="cool-circle cool-circle-1"></div>
    <div class="cool-circle cool-circle-2"></div>
    <div class="dot dot-1"></div>
    <div class="dot dot-2"></div>
    <div class="dot dot-3"></div>
    <div class="dot dot-4"></div>
</section>
!

CSS 

              
                @import 'https://fonts.googleapis.com/css?family=Shadows+Into+Light';
html,
body {
  height: 100%;
}

body {
  font-family: 'Shadows Into Light', cursive;
}

.title {
  margin: 0;
  position: relative;
  top: -100px;
  font-size: 40px;
  position: absolute;
  left: 0;
  right: 0;
  color: #ff2c63;
  &.title-2 {
    top: auto;
    bottom: -70px;
    color: #444;
  }
}

.main-content {
  position: relative;
}

.avocode-wrap {
  position: absolute;
  top: 30%;
  transform: translateY(50%);
  left: 0;
  right: 0;
  width: 700px;
  margin: 0 auto;
  text-align: center;
  &:after {
    content: '';
    background: #000;
    width: 70%;
    height: 10px;
    display: block;
    margin: 0 auto;
    border-radius: 20px;
    box-shadow: 0px 5px 12px 0px rgba(74, 74, 74, 0.6);
  }
  &:before {
    content: '';
    background: #000;
    width: 20px;
    height: 10px;
    display: inline-block;
    border-radius: 30px;
    position: absolute;
    bottom: 0;
    left: 75px;
    box-shadow: 0px 5px 12px 0px rgba(74, 74, 74, 0.6);
  }
}

.egg {
  display: inline-block;
  width: 230px;
  height: 305px;
  margin: 20px auto 0;
  -webkit-border-radius: 63px 63px 63px 63px / 108px 108px 72px 72px;
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  -webkit-box-shadow: 0px 0px 20px #D5D3D3, 0px 0px 20px #D5D3D3;
  -moz-box-shadow: 0px 0px 20px #D5D3D3, 0px 0px 20px #D5D3D3;
  background: #a2ff66;
  box-shadow: 0px 0px 0px 10px #080808, inset 0 0 20px 20px #25e552;
  position: relative;
  overflow: hidden;
  &.happy {
    margin-left: -25px;
    .face {
      background: #DAA04E;
      box-shadow: inset -14px 0 0px 0px #ad7a31;
    }
    .line {
      left: 24px;
      transform: rotate(117deg);
      > span {
        &:first-child {
          margin-right: 4px;
          width: 15px;
        }
        &:last-child {
          width: 30px;
        }
      }
    }
  }
  &.smile {
    animation: shake 4s ease-in-out infinite;
    &:after {
      content: '';
      background: rgba(65, 181, 45, 0.3);
      display: block;
      width: 325px;
      height: 325px;
      border-radius: 50%;
      position: absolute;
      right: -247px;
      top: -15px;
    }
  }
  .line {
    position: absolute;
    top: 65px;
    transform: rotate(117deg);
    left: 13px;
    &.line1 {
      top: 139px;
      z-index: 11;
      left: 50px;
      transform: rotate(130deg);
      span:first-child {
        margin-right: 2px;
        background: #e6c496;
      }
      span:last-child {
        width: 18px;
        background: #e6c496;
      }
    }
    > span {
      width: 40px;
      height: 12px;
      background: #fff;
      display: inline-block;
      border-radius: 30px;
      &:first-child {
        margin-right: 4px;
        width: 20px;
      }
    }
  }
}

.face {
  width: 150px;
  height: 150px;
  position: absolute;
  background: -moz-linear-gradient(270deg, rgba(160, 254, 101, 1) 0%, rgba(160, 254, 101, 1) 1%, rgba(98, 236, 86, 1) 88%, rgba(90, 234, 85, 1) 100%);
  /* ff3.6+ */
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, rgba(160, 254, 101, 1)), color-stop(1%, rgba(160, 254, 101, 1)), color-stop(88%, rgba(98, 236, 86, 1)), color-stop(100%, rgba(90, 234, 85, 1)));
  /* safari4+,chrome */
  background: -webkit-linear-gradient(270deg, rgba(160, 254, 101, 1) 0%, rgba(160, 254, 101, 1) 1%, rgba(98, 236, 86, 1) 88%, rgba(90, 234, 85, 1) 100%);
  /* safari5.1+,chrome10+ */
  background: -o-linear-gradient(270deg, rgba(160, 254, 101, 1) 0%, rgba(160, 254, 101, 1) 1%, rgba(98, 236, 86, 1) 88%, rgba(90, 234, 85, 1) 100%);
  /* opera 11.10+ */
  background: -ms-linear-gradient(270deg, rgba(160, 254, 101, 1) 0%, rgba(160, 254, 101, 1) 1%, rgba(98, 236, 86, 1) 88%, rgba(90, 234, 85, 1) 100%);
  /* ie10+ */
  background: linear-gradient(180deg, #83f961 0%, #95fd64 1%, #62ec56 88%, #5aea55 100%);
  /* w3c */
  border-radius: 50%;
  margin: 0 auto;
  left: 0;
  right: 0;
  bottom: 42px;
}

.happy {
  animation: shake-reverse 5s ease-in-out infinite;
  .face {
    z-index: 1;
  }
  .eye {
    &.left {
      &:before {
        background: #ae7d42;
      }
    }
    &.right {
      &:before {
        content: '';
        background: #ae7d42;
        width: 15px;
        height: 15px;
        display: block;
        border-radius: 50%;
        position: relative;
        top: 22px;
        right: -10px;
      }
    }
  }
}

@keyframes shake {
  0% {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(12deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

@keyframes shake-reverse {
  0% {
    transform: rotate(0deg);
  }
  50% {
    transform: rotate(-9deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

.eye {
  width: 19px;
  height: 19px;
  background: #000;
  display: inline-block;
  border-radius: 50%;
  margin-top: 50px;
  &.left {
    margin-right: 30px;
    &:before {
      content: '';
      background: #1bbc38;
      width: 15px;
      height: 15px;
      display: block;
      border-radius: 50%;
      position: relative;
      top: 22px;
      left: -10px;
    }
  }
  &.right {
    &:before {
      content: '';
      background: #1bbc38;
      width: 15px;
      height: 15px;
      display: block;
      border-radius: 50%;
      position: relative;
      top: 22px;
      right: -10px;
    }
  }
}

.smile {
  .mouth {
    width: 4px;
    height: 14px;
    background-color: transparent;
    border: 4px solid #080808;
    border-radius: 50%;
    border-right-color: transparent;
    transform: scale(1.3) rotate(-90deg);
    margin: 0 auto;
    background: none;
    box-shadow: none;
  }
}

.mouth {
  width: 30px;
  height: 15px;
  display: block;
  border: 3px solid #000;
  border-radius: 0 0 20px 20px;
  margin: 10px auto;
  background: #f96d85;
  box-shadow: inset 0px 0 3px 2px #000;
}

.face-shadow {
  width: 150px;
  height: 150px;
  background: #75ec44;
  display: block;
  position: absolute;
  bottom: 35px;
  left: 52px;
  border-radius: 50%;
  z-index: 0;
}

.star {
  width: 70px;
  height: 50px;
  background: url('https://cssanimation.rocks/images/posts/steps/twitter_fave.png') no-repeat;
  top: 0;
  position: absolute;
  left: 10%;
  z-index: 12;
  -webkit-animation: play .8s steps(55) infinite;
  -moz-animation: play .8s steps(55) infinite;
  -ms-animation: play .8s steps(55) infinite;
  -o-animation: play .8s steps(55) infinite;
  animation: play .8s steps(55) infinite;
  &.star2 {
    left: auto;
    right: 10%;
    animation-delay: 1s;
  }
  &.star3 {
    left: auto;
    top: 200px;
    right: 5%;
    animation-delay: 1.5s;
  }
  &.star4 {
    top: 71%;
    animation-delay: 2s;
    left: 0px;
  }
}

@-webkit-keyframes play {
  from {
    background-position: 0px;
  }
  to {
    background-position: -3519px;
  }
}

@-moz-keyframes play {
  from {
    background-position: 0px;
  }
  to {
    background-position: -3519px;
  }
}

@-ms-keyframes play {
  from {
    background-position: 0px;
  }
  to {
    background-position: -3519px;
  }
}

@-o-keyframes play {
  from {
    background-position: 0px;
  }
  to {
    background-position: -3519px;
  }
}

@keyframes play {
  from {
    background-position: 0px;
  }
  to {
    background-position: -3519px;
  }
}

.sparkle {
  position: absolute;
  top: 0;
  right: 0;
  width: 50px;
  height: 50px;
  background-color: #ff8052;
  .circle-1 {
    position: absolute;
    top: -25px;
    right: -25px;
    width: 50px;
    height: 50px;
    background-color: #fff;
    border-radius: 50%;
    &:after {
      content: "";
      position: absolute;
      top: 0px;
      left: -50px;
      width: 50px;
      height: 50px;
      background-color: #fff;
      border-radius: 50%;
    }
  }
  .circle-2 {
    position: absolute;
    bottom: -25px;
    right: -25px;
    width: 50px;
    height: 50px;
    background-color: #fff;
    border-radius: 50%;
    &:after {
      content: "";
      position: absolute;
      bottom: 0px;
      left: -50px;
      width: 50px;
      height: 50px;
      background-color: #fff;
      border-radius: 50%;
    }
  }
}

.sparkle-2 {
  top: 0;
  left: 12px;
  transform: scale(0.5);
}

.sparkle-3 {
  top: 70px;
  left: 10px;
  transform: scale(0.3);
  background-color: #ffd150;
}

.sparkle-4 {
  top: 80px;
  left: 50px;
  transform: scale(0.5);
}

.sparkle-5 {
  top: 70px;
  right: 85px;
  transform: scale(0.5);
  background-color: #ffd150;
}

.plus {
  position: absolute;
  top: 0;
  width: 10px;
  height: 30px;
  border-radius: 5px;
  &:before {
    content: "";
    position: absolute;
    height: 10px;
    width: 30px;
    border-radius: 5px;
  }
  &.plus-1 {
    top: -60px;
    left: 21%;
    background-color: #48befe;
    transform: scale(0.6);
    &:before {
      top: 10px;
      left: -10px;
      background-color: #48befe;
    }
  }
  &.plus-2 {
    top: 160px;
    right: 10px;
    background-color: #ffdb01;
    transform: scale(0.8);
    &:before {
      top: 10px;
      left: -10px;
      background-color: #ffdb01;
    }
  }
}

.cool-circle {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  &.cool-circle-1 {
    top: 50%;
    box-shadow: 0 0 0 5px #ff2c63;
  }
  &.cool-circle-2 {
    top: 40%;
    right: 74px;
    box-shadow: 0 0 0 5px #2ee752;
    width: 15px;
    height: 15px;
  }
}

.dot {
  position: absolute;
  top: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  left: 50%;
  background: #63ec56;
  &.dot-1 {
    top: 4%;
    left: 45%;
    background: #ffd150;
    width: 15px;
    height: 16px;
  }
}
!

JS 

              
                //Inspired By: https://dribbble.com/shots/2884662-Avocado
!
999px

Console