#earth {
	position: fixed;
	top: 5%;
	right: 5%;
	width: 15vw;
	height: 15vw;
	border-radius: 50%;
	background: url('earth.gif') no-repeat center center;
	background-size: cover;
	box-shadow: 0 0 20px rgba(0, 100, 255, 0.7);
	transform-origin: center center;
	animation: pulse 4s infinite ease-in-out;
	z-index: 1000;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}