@keyframes intro{
  50% {
    transform:rotate(180deg);
    color:#00FA00;
  }
  100% {
    transform:rotate(360deg);
    color:#000;
  }
}
.introHeader{
  animation-name:intro;
  animation-duration:2.5s;
}
div {
  width:100px;
  height:120px;
  border: solid thin #000000;
  background-color:#9999FF;
  margin:10px;
  padding:10px;
  float:left;
}
h4 {
  font-family:Arial, sans serif;
}
.card {
  color:#9999FF;  
}
.card:hover {
  transition:color 2s;
  transition-delay: 0.5s;
  color:#000;
}