body{
   background-color:#37353E ;
}
#a1 {
    color: #715A5A;
    animation-play-state: running;
}
.box {
  background-color: rgb(221, 19, 19);
  border-radius: 10px;
  width: 100px;
  height: 100px;
  animation-name: rotate;
  animation-duration: 0.02s;
  animation-iteration-count: infinite;
  animation-play-state: paused;
}

.box:hover {
  animation-play-state: running;
}

@keyframes rotate {
  0% {
    transform: rotate(100);
  }
  100% {
    transform: rotate(180deg);
  }
}