wrong!

loop.js

window.onload= function(){

	var styleSet = {
		boxShadow: "0 1px 3px rgba(0,0,0,0.5)",
		textShadow: "1px 1px #000",
		backgroundColor: "lightBlue",
		padding: "1em",
		margin: "2em 0"
	}
	
	var elements = document.getElementsByTagName('section');

	for (var e in elements) {
		console.log("loop " + e)
	}
}