Add this to in the your text's template (preferably in the header), then use blink tag for your text like <blink>Here Blinks!</blink>
PHP Code:
<SCRIPT LANGUAGE="JavaScript">
function BlinkTxt() {
if(document.getElementById && document.all){
obj = document.getElementsByTagName("blink");
for (var i=0; i<obj.length; i++)
if (obj[i].style.visibility=="hidden") {
obj[i].style.visibility="visible";
}
else {
obj[i].style.visibility="hidden";
}
setTimeout('BlinkTxt()',350);
}
}
onload=BlinkTxt;
</SCRIPT>