http://tympanus.net/Development/IconHoverEffects/#set-2

gistfile1.txt

.hi-icon-effect-6 .hi-icon {
  box-shadow: 0 0 0 4px rgba(255,255,255,1);
	transition: background 0.2s, color 0.2s;	
}

.no-touch .hi-icon-effect-6 .hi-icon:hover {
	background: rgba(255,255,255,1);
	color: #64bb5d;
}

.no-touch .hi-icon-effect-6 .hi-icon:hover:before {
	animation: spinAround 2s linear infinite;
}

@keyframes spinAround {
	from {
		transform: rotate(0deg)
	}
	to {
		transform: rotate(360deg);
	}
}