.dancin pre {
  color: #333;
  display:block;
  animation: animationFrames 1s linear infinite;
}

@keyframes animationFrames {
  0% {
    color:#333;
    display:none;
  }
  25% {
            color:#555;
            display:block;
  }
  26% {
        color:#777;
                    display:none;

  }
  50% {
            color:#999;
            display:block;

  }
  51% {
        color:#CCC;
                            display:none;

  }
  75% {
            color:#FFF;
                        display:block;

  }
  76% {
        color:#AAA;
        display:none;

  }
  100% {
        color:#333;
                    display:block;

  }
}

.frame1 {
          color:#FFF;

  animation-delay: 0s;
}

.frame2 {
        color:#000;

  animation-delay: 1s;
}

.frame3 {
        color:#000;

  animation-delay: 2s;
}

.frame4 {
        color:#000;

  animation-delay: 3s;
}