Looping Animation of text color change using CSS3

Question

I have text that I want to animate. Not on hover, for example but continually changing slowly from white to red and then back to white again.

Here is my CSS code so far:

#countText{
    color: #eeeeee;
    font-family: "League Gothic", Impact, sans-serif;
    line-height: 0.9em;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    text-shadow: 0px 0px 6px ;
    font-size: 210px;
}