html, body {
	margin: 0;
	width: 100%;
	height: 100%;
}
#stage {
	width: 100%;
	height: 100%;
}

.view {
	position: absolute;
	width: 100%;
	height: 100%;
	text-align: center;
}

button {
	width: 50%;
	height: 10%;
	margin: 5%;
}

#view0 {
	background-color: linen;
}
#view1 {
	background-color: azure;
}
#view2 {
	background-color: ivory;
}
#view3 {
	background-color: pink;
}