.loader {
  width: 96px;
  height: 48px;
  display: inline-block;
  position: relative;
  background: #5e5e5e;
  border-radius: 48px 48px 0 0;
  box-sizing: border-box;
  overflow: hidden;
}

.loader::after {
  content: '';
  box-sizing: border-box;
  position: absolute;
  width: 24px;
  height: 12px;
  border-radius: 24px 24px 0 0;
  background: yellow;
  left: 50%;
  transform: translateX(-50%);
  bottom: 0;
}

.loader::before {
  content: '';
  position: absolute;
  width: 4px;
  height: 32px;
  left: 0;
  right: 0;
  margin: auto;
  bottom: 0;
  background: yellow;
  transform-origin: 50% 100%;
  box-sizing: border-box;
  animation: animloader 2s linear infinite alternate;
}

@keyframes animloader {
  0% {
    transform: rotate(-70deg);
  }

  10% {
    transform: rotate(-40deg);
  }

  20%, 45%, 35% {
    transform: rotate(-10deg);
  }

  40%, 30% {
    transform: rotate(-30deg);
  }

  50%, 60% {
    transform: rotate(20deg);
  }

  55%, 65%, 75% {
    transform: rotate(40deg);
  }

  70% {
    transform: rotate(45deg);
  }

  85%, 90% {
    transform: rotate(50deg);
  }

  95% {
    transform: rotate(75deg);
  }

  100%, 93% {
    transform: rotate(70deg);
  }
}