body{
 font-family: arial;
 background-image:url("back1.jpg");
 background-repeat: no-repeat;
 background-position: center;
 background-size: cover;
}
h1{
	text-align:center;
	color:black;
	margin: 30px 0 50px;
}
.gallery
{
	margin:10px 50px;
	margin-left:150px;
}
.gallery img{
	width:250px;
	height:250px;
	border:3px solid black;
	margin-top:40px ;
	margin-right: 40px;
}
.gallery img:hover{
    transform:scale(1.2);
}