test BACKGROUND COLOR CHANGE

 0% { background: #FFABAB; }
  20% { background: #FFDAAB; }
  40% { background: #DDFFAB; }
  60% { background: #ABE4FF; }
  80% { background: #D9ABFF; }
  100% { background: #FFABAB; }
}

.top {
  min-height: 200px;
  -webkit-animation: rainbow 10s infinite steps(1);
}