Oddly enough Chrome/Blink still has the String.prototype.blink method to create a blink tag from a string. If I recall correctly it's actually part of an ES (not DOM) standard.
I was trying to find the ES standard where it's specified but I'll settle for this[1] instead. Interestingly enough you have quite a few HTML wrapping functions as part of the spec.
[1]: http://javascript.spec.whatwg.org/#string.prototype.blink
<p style="color: red">
<script>
var str="•";
document.write(str.blink());
</script>
</p>
That would make a blinking red dot. It'd be good for status lights, I guess.