<div class='pizza'>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
  <div class='slice'></div>
</div>
body {
  height: 100vh;
  width: 100vw;
  align-items: center;
  display: flex;
  justify-content: center;
  margin: 0;
  overflow: hidden;
  background: radial-gradient(circle at center, #cc9933, #333300);
}
body:before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
  width: 15vmin;
  height: 2vmin;
  background: #00000080;
  margin-top: 17.5vmin;
  filter: blur(10px);
  border-radius: 100%;
}
body p {
  position: absolute;
  bottom: 10px;
  right: 10px;
  color: #fff;
  font-size: 10px;
}
body .pizza {
  height: 20vmin;
  width: 20vmin;
  align-items: center;
  background: none;
  position: relative;
  animation: rotate 5s linear infinite;
}
@keyframes rotate {
  to {
    transform: rotate(360deg);
  }
}
body .pizza .slice {
  z-index: -1;
  overflow: visible;
  position: absolute;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10vmin 2.75vmin 0 2.75vmin;
  border-color: #ffdc73 transparent transparent transparent;
  left: 7.5vmin;
  top: 0;
  transform-origin: 50% 100%;
  transform: rotate(0deg);
  animation: loading 1.8125s ease-in-out infinite;
}
@keyframes loading {
  0% {
    opacity: 1;
  }
  49% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
  99% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
body .pizza .slice:nth-of-type(2n):after {
  box-shadow: 0.5vmin 2.5vmin 0 #cc333f;
}
body .pizza .slice:nth-of-type(4n):after {
  box-shadow: 0.5vmin 2.5vmin 0 #cc333f, 1.5vmin 5vmin 0 #cc333f;
}
body .pizza .slice:nth-of-type(1) {
  transform: rotate(-27.75deg);
  animation-delay: -0.0625s;
}
body .pizza .slice:nth-of-type(2) {
  transform: rotate(-55.5deg);
  animation-delay: -0.125s;
}
body .pizza .slice:nth-of-type(3) {
  transform: rotate(-83.25deg);
  animation-delay: -0.1875s;
}
body .pizza .slice:nth-of-type(4) {
  transform: rotate(-111deg);
  animation-delay: -0.25s;
}
body .pizza .slice:nth-of-type(5) {
  transform: rotate(-138.75deg);
  animation-delay: -0.3125s;
}
body .pizza .slice:nth-of-type(6) {
  transform: rotate(-166.5deg);
  animation-delay: -0.375s;
}
body .pizza .slice:nth-of-type(7) {
  transform: rotate(-194.25deg);
  animation-delay: -0.4375s;
}
body .pizza .slice:nth-of-type(8) {
  transform: rotate(-222deg);
  animation-delay: -0.5s;
}
body .pizza .slice:nth-of-type(9) {
  transform: rotate(-249.75deg);
  animation-delay: -0.5625s;
}
body .pizza .slice:nth-of-type(10) {
  transform: rotate(-277.5deg);
  animation-delay: -0.625s;
}
body .pizza .slice:nth-of-type(11) {
  transform: rotate(-305.25deg);
  animation-delay: -0.6875s;
}
body .pizza .slice:nth-of-type(12) {
  transform: rotate(-333deg);
  animation-delay: -0.75s;
}
body .pizza .slice:before {
  content: "";
  position: absolute;
  height: 1.5vmin;
  width: 6vmin;
  background: #bbb083;
  top: -10.5vmin;
  left: -3vmin;
  border-radius: 100vmin 100vmin 0.5vmin 0.5vmin/50vmin 50vmin;
}
body .pizza .slice:after {
  content: "";
  border-radius: 100%;
  position: absolute;
  width: 1.25vmin;
  height: 1.25vmin;
  background: #cc333f;
  left: -1vmin;
  top: -7vmin;
  z-index: 2;
}

External CSS

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