@keyframes rotate {
  100% {
    transform: rotate(1turn);
  }
}

@keyframes blink {
  40% {
    opacity:.5;
  }
  80% {
    opacity: 1;
  }
}


.rotated_box {
  position: relative;
  width: 200px;
  height: 200px;
  overflow: hidden;

  &::before {
    content: "";
    position: absolute;
    left: -50%;
    top: -50%;
    width: 200%;
    height: 200%;
    background-repeat: no-repeat;
    background-size: 50% 50%;
    background-position: 0 0, 100% 0, 100% 100%, 0 100%;
    background-image: linear-gradient(#399953, #399953), linear-gradient(#fbb300, #fbb300), linear-gradient(#d53e33, #d53e33), linear-gradient(#377af5, #377af5);
    animation: rotate 3s linear infinite;
  }

  &:after {
    content: "";
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    background: #fff;
  }
}

.rotated_box_demo {
  position: relative;
  width: 200px;
  height: 200px;
  overflow: hidden;

  &::before {
    content: "";
    position: absolute;
    left: -50%;
    top: -50%;
    width: 200%;
    height: 200%;
    background-repeat: no-repeat;
    background-size: 50% 50%;
    background-position: 0 0, 100% 0, 100% 100%, 0 100%;
    background-image: linear-gradient(#399953, #399953), linear-gradient(#fbb300, #fbb300), linear-gradient(#d53e33, #d53e33), linear-gradient(#377af5, #377af5);
    animation: rotate 3s linear infinite;
  }

  &:after {
    content: "";
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    background: #fff;
    animation: blink 5s linear infinite;
  }
}