wins44 var container = document.querySelector('.layout.horizontal.wrap');
var mr4Elements = container.querySelectorAll('.mr4');
===== [ var fourthMr4Element = mr4Elements[3]; ] =====
fourthMr4Element.style.position = 'absolute';
fourthMr4Element.style.top = '0';
fourthMr4Element.style.left = '0';