hello-world5.html

<h1 id = "text" style="color:blue;font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif">
    Hello world
</h1>
<img src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTnPGTruyUewUiIMIXIhm_cbdUWjAaOfreHEb6Lue8In3YtwIJZ">
<footer id = "name" style="color:blueviolet;font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif">
    By Juan V. 
</footer>
<script>
        function flashtext(ele,col) {
    var tmpColCheck = document.getElementById( ele ).style.color;

      if (tmpColCheck === 'silver') {
        document.getElementById( ele ).style.color = col;
      } else {
        document.getElementById( ele ).style.color = 'silver';
      }
    } 

    setInterval(function() {
        flashtext('text','red');
        flashtext('text2','blue');
        flashtext('text3','green');
    }, 500 ); //set an interval timer up to repeat the function
</script>