SOURCE

<div class="head">
	<div>
		<p>
			<div>div5</div>
            div4
		</p>
        <div>div6</div>
		div1
	</div>
	<div>
		div2
	</div>
	<div>
		div3
	</div>

</div>

.head > div:nth-child(2){
    color: red
}
div:first-child{
    color: blue
}
.head > div:last-child{
    color: green
}
.head p:nth-of-type(1){
    color: grey
}