body {
	border: pink solid 1px;
	width: 800px;
	margin: 0 auto;
}

div div{
	border: green dotted 1px;
	width: 70px;
	margin: 5px auto;
	text-align:center;
	display: inline-block;
}

div div:first-child{
	background-color:pink;
}
div div:last-child{
	background-color:yellowgreen;
}
div div:nth-child(4){
	background-color:skyblue;
}