how to make CSS animation to play every 10 seconds

Question

I have a css animation, which it either repeat infinite or only a certain times. but I would like to play it like 2 times every 5 seconds. Here is my code:

    #countText{
    -webkit-animation-name: color2;
    -webkit-animation-duration: 1s;
    -webkit-animation-iteration-count: 2;
    -webkit-animation-timing-function: linear;
    -webkit-animation-delay: 5s;
}
@-webkit-keyframes color2 {
        0% { }
        25% { text-shadow:-2px -5px 10px #fb0017, -5px 0px 10px #3a00cd, -5px 5px 10px #00ff3a}
        50% { }
        75% { text-shadow:2px 5px 10px #fb0017, 5px 0px 10px #3a00cd, 5px -5px 10px #00ff3a; }
        100% {}
}

Answer 1

You can change the keyframes to show animation twice. First from 0% to 20% and next from 20% to 40%, then let it stay like that till 100%. Now change animation-duration to 5s with no animation-delay

  #countText {
      -webkit-animation-name: color2;
      -webkit-animation-duration: 5s;
      -webkit-animation-iteration-count: infinite;
      -webkit-animation-timing-function: linear;
      -webkit-animation-delay: 0s;
  }
  @-webkit-keyframes color2 {
      0% {
      }
      5%,25% {
          text-shadow: -2px -5px 10px #fb0017,
                       -5px 0px 10px #3a00cd,
                       -5px 5px 10px #00ff3a;
      }
      15%,35% {
          text-shadow: 2px 5px 10px #fb0017,
                       5px 0px 10px #3a00cd,
                       5px -5px 10px #00ff3a;
      }
      40% {
        text-shadow: none;
    }
}

Demo