last_setTimeout_Example.html

<!DOCTYPE html>
<html>
<head>
	<title>Closure</title>
	<style type="text/css">
		.box{
			width: 200px;
			height: 200px;
			border: 1px solid #000;
		}
	</style>
</head>
<body>
<div class="box"></div>
<script type="text/javascript">
	colors = ['red', 'green', 'blue'];
	let box = document.querySelector('.box');

	function changeColor(node, colors ){
		return function(){
			for(let i = 0; i<colors.length; i++){
				console.log(`i = ${i}`);
				node.style.backgroundColor= colors[i];
			}
		}
	}

	setTimeout( changeColor(box, colors), 2000);

</script>
</body>
</html>