body {
	margin: 40px;
}
.bg01 {
	background-image: url(start01.jpg);
	background-repeat: no-repeat;
	height: 450px;
	width: 450px;
}
.bg02 {
	background-image: url(start02.jpg);
	background-repeat: no-repeat;
	height: 450px;
	width: 450px;
}
.button {
	left: 120px;
	top: 190px;
	position: relative;
}