CSS Pulse Animated Borders

Here's how to create a simple pulse effect on the borders of a div

- Powered by CSS attribut : box-shadow

/* ANIMATION PULSE */
@keyframes animated-border {
	0% {
		box-shadow: 0 0 0 0 rgba(255, 255, 255, .4);
	}
	100% {
		box-shadow: 0 0 0 30px rgba(255, 255, 255, 0);
	}
}