.hopper {
	width:100px; height:100px;
	margin:10px;
}
.hopper-01 {
	color:#fff;
	background:#f00;
}
.hopper-02 {
	color:#000;
	background:#ff0;
}
.hopper-03 {
	color:#000;
	background:#0f0;
}
.hopper-04 {
	color:#000;
	background:hotpink;
}
.hopper-05 {
	color:#000;
	background:goldenrod;
}

.controls {
	position:fixed; right:10px; top:10px;
}

.log {
	position:fixed; right:10px; bottom:10px;
	padding:10px;
	background:#eee;
}