*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
section{
  display: flex;
  height: 100vh;
  width: 100%;
  background: #000;
  align-items: center;
  justify-content: center;
}
.loader{
  height: 25px;
  width: 25px;
  position: relative;
  animation: rotate 5s  infinite;
}
.ball{
  position: absolute;
  height: 25px;
  width: 25px;
  border-radius: 50%;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
}
.upper{
  left: 0;
  top: -22px;
  background: #2da2ff;
  animation: upper 1s linear infinite;
}
@keyframes upper {
  50%{
    top: 22px;
  }
  100%{
    top: 22px;
  }
}
.right{
  right: -22px;
  top: 0;
  background: #ff337a;
  animation: right 1s linear infinite;
}
@keyframes right {
  50%{
    right: 22px;
  }
  100%{
    right: 22px;
  }
}
.lower{
  bottom: -22px;
  left: 0;
  background: #ffff00;
  animation: lower 1s linear infinite;
}
@keyframes lower {
  50%{
    bottom: 22px;
  }
  100%{
    bottom: 22px;
  }
}
.left{
  left: -22px;
  top: 0;
  background: #00ff00;
  animation: left 1s linear infinite;
}
@keyframes left {
  50%{
    left: 22px;
  }
  100%{
    left: 22px;
  }
}