*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html,
body {
  height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background-color: #212121;
  font-family:arial;
}
.loader {
  width: 64px;
  height: 64px;
  position: relative;
  background: #FFF;
  border-radius: 4px;
  overflow: hidden;
}

.loader:before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 40px;
  transform: rotate(45deg) translate(30%, 40%);
  background: #ff9371;
  box-shadow: 32px -34px 0 5px #ff3d00;
  animation: slide 2s infinite ease-in-out alternate;
}

.loader:after {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #ff3d00;
  transform: rotate(0deg);
  transform-origin: 35px 145px;
  animation: rotate 2s infinite ease-in-out;
}

@keyframes slide {
  0% , 100% {
    bottom: -35px
  }

  25% , 75% {
    bottom: -2px
  }

  20% , 80% {
    bottom: 2px
  }
}

@keyframes rotate {
  0% {
    transform: rotate(-15deg)
  }

  25% , 75% {
    transform: rotate(0deg)
  }

  100% {
    transform: rotate(25deg)
  }
}