body {
	height: 3000px;
	padding: 0;
	margin: 0;
}

div, section {
	min-height: 2px;
}

.page {
	max-width: 800px;
	margin: 0 auto;
	margin-top: 100px;
}

#parent {
	float: left;
	width: 40%;
	background-color: green;
}

#parent2 {

	float: left;
	width: 60%;
	background-color: red;
}

#parent3 {
	float: left;
	width: 40%;
	background-color: red;
}

#parent4 {

	float: left;
	width: 60%;
	background-color: green;
	height: 100px;
}


#parent5 {

	float: left;
	width: 100%;
	background-color: blue;
	height: 100px;
}





#parent_clone, #parent2_clone, #parent3_clone, #parent4_clone {
	background-color: grey;
	position: fixed;
	top: 0;
}


#parent5_clone {
	position: fixed;
	bottom: 0;
	left: 0 !important;
	background-color: blue;
	width: 100% !important;
}

span {
	padding: 10px 0;
	display: block;
}