Instead of nested functions when animating

gistfile1.js

var p = new $.Deferred().resolve();
$.each([
    [$marker, 100],
    [$america, 150],
    [$england, 80],
    [$australia, 300]
], function(_, x) {
    p = p.then(function() {
        return x[0].animate({
            top : x[1]+'px'
        }, 500, 'easeOutBounce').promise();
    });
});