#box{
	margin-left:auto;
	margin-right:auto;
	background: #d6eaf8 ;
	border-style: solid;
	position:relative;
}
.particle{
	width:10px;
	height:10px;
	background:red;
	border-radius:50%;
	position:absolute;
}
.btn-group.special {
	display: flex;
}
.col-form-label{
	padding-right:0;
}
.special .btn {
	flex: 1
}