<div id="app-cover">
  <div class="square">
    <span></span>
    <span></span>
    <span></span>
    <span></span>
  </div>
  <div id="ghost">
    <div id="eyes">
      <div class="eye"></div>
      <div class="eye"></div>
    </div>
    <div id="mouth"></div>
    <div id="legs"></div>
  </div>
</div>
body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #32333b;
}
#app-cover {
  position: relative;
  transform: scale(2);
}
.square {
  position: relative;
  height: 140px;
  width: 140px;
  box-shadow: inset 0 0 0 10px #464852;
  animation: rotate 4s linear infinite;
}
@keyframes rotate {
  0% {
    transform: rotate(360deg);
  }
  100% {
    transform: rotate(0deg);
  }
}
.square span {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  overflow: hidden;
}
.square span:before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  border: none;
  border-top: 10px solid #fff;
  animation: animate 2s linear infinite;
}
@keyframes animate {
  0% {
    left: -100%;
  }
  25% {
    left: 0;
  }
  50%,
  100% {
    left: 100%;
  }
}
.square span:nth-child(1) {
  transform: rotate(0deg);
}
.square span:nth-child(2) {
  transform: rotate(90deg);
}
.square span:nth-child(3) {
  transform: rotate(180deg);
}
.square span:nth-child(4) {
  transform: rotate(270deg);
}

.square span:nth-child(1):before {
  animation-delay: 0s;
}
.square span:nth-child(2):before {
  animation-delay: 0.5s;
}
.square span:nth-child(3):before {
  animation-delay: 1s;
}
.square span:nth-child(4):before {
  animation-delay: 1.5s;
}
#ghost {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  width: 66px;
  height: 66px;
  margin: -37.5px auto 0 auto;
  background-color: #fff;
  border-radius: 50% 50% 0 0;
  animation: updown 4s ease 0s infinite forwards;
  box-shadow: inset -3px 0 0 0px #e4e4e4, 0 0px 0px 6px #e91e63;
}
@keyframes updown {
  0% {
    margin-top: -37.5px;
  }
  25% {
    margin-top: -50px;
  }
  50% {
    margin-top: -37.5px;
  }
  75% {
    margin-top: -50px;
  }
  100% {
    margin-top: -37.5px;
  }
}
#eyes {
  top: 20px;
  left: 0;
  right: 0;
  margin: 0 auto;
}
.eye {
  background-color: #000;
  border-radius: 50%;
}
#eyes,
.eye {
  position: absolute;
  width: 17px;
  height: 17px;
}
.eye:first-child {
  left: -14px;
}
.eye:last-child {
  left: 14px;
}
.eye:before {
  content: "";
  position: absolute;
  top: 5px;
  left: 4px;
  width: 4px;
  height: 4px;
  background-color: #fff;
  border-radius: 50%;
}
#mouth {
  position: absolute;
  top: 42px;
  left: 0;
  right: 0;
  width: 12px;
  height: 12px;
  background-color: #000;
  border-top-width: 0;
  border-radius: 0 0 100% 100%;
  margin: 0 auto;
}
#mouth:before,
#mouth:after {
  content: "";
  position: absolute;
  top: -3px;
  width: 10px;
  height: 6px;
  background-color: #ff6d9f;
  border-radius: 10px;
}
#mouth:before {
  left: -15px;
}
#mouth:after {
  right: -15px;
}
#legs {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -20px;
  width: 22px;
  height: 22px;
  margin: 0 auto;
  background-color: #fff;
  border-radius: 0 0 50% 50%;
}

#legs:before,
#legs:after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: #fff;
  border-radius: 0 0 50% 50%;
}

#legs:before {
  left: -22px;
}

#legs:after {
  left: 22px;
  box-shadow: inset -3px 0 0 0px #e4e4e4;
}

External CSS

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External JavaScript

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