.loader {
  position: fixed;
  left: 50%;
  top: 50%;
  width: 34px;
  aspect-ratio: 1;
  background: #4caf50;
  animation: l7-1 1s infinite alternate, l7-2 2s infinite alternate;
  border-radius: 3px;
}
@keyframes l7-1 {
  0%,
  10% {
    transform: scale(1) rotate(0);
  }
  100% {
    transform: scale(0) rotate(1turn);
  }
}
@keyframes l7-2 {
  0%,
  16.66% {
    background: #4caf50;
  }
  16.67%,
  33.32% {
    background: #ffdc49;
  }
  33.33%,
  49.98% {
    background: #ef5350;
  }
  50%,
  66.65% {
    background: #42a5f5;
  }
  66.66%,
  83.31% {
    background: #3b5998;
  }
  83.32%,
  100% {
    background: #e255a1;
  }
}