mock JS procedure for getting tumblr images

function getPosts(){
		query = "moonrise kingdom";
		var tumblr = require('tumblr.js');
		var client = tumblr.createClient({ consumer_key: '5AePbGS74iGUh2v1vIaLfxOeDAyS2X8sRPpnOPczwtFzGXEvz7' });
		initialize data structure
		client.tagged(query, function (err, data) { 
			//put 1000 image urls into a list
			});
		setInterval(function(){changeImage()},3000); //once posts are gotten, start changing background
	}
	function changeImage()
	{
		url = "https://24.media.tumblr.com/d2220b41e45b533c6aad4f2611467eb4/tumblr_myfi6a9AiQ1qjvnc4o1_500.jpg";
		document.body.style.backgroundImage="url(" + url + ")";
	}