$(document).ready(function() {
	blink();		
});

function blink() {
	$('.blink').animate({
	    opacity: 0.5	    
	}, 500, function() {
	    // Animation complete.
	});
	
	$('.blink').animate({
	    opacity: 1	    
	}, 500, function() {
	    // Animation complete.
	});

	setTimeout(blink, 1000);	
}