Stop after three blinks

Hi I'm trying to create a title on the title bar that blinks. i only want it to blink three times then stop here's the code

<script language="javascript">
function blinkTitle(binShow) {


if(binShow) {
window.document.title = "*** (1) Message ***";
setTimeout("blinkTitle()", 500);
}
else {
window.document.title = " . ";
setTimeout("blinkTitle(true)", 500);
}

}
</script>

i hopw you ca help me out