.zi img {
	height: 200px;
	width: 200px;
	-webkit-transition: all 2s ease;
	-moz-transition: all 2s ease;
	-ms-transition: all 2s ease;
	transition: all 2s ease;
}
.zi img:hover {
	width: 350px;
	height: 350px;
}
img {
	display: block;
	margin-left: auto;
	margin-right: auto;
}
h1 {
	font-family:arial;
	text-align:center;
}