<html> <head> <style> div { width: 200px; height: 200px; background-color: blue; filter: greyscale(50%); position: relative; } #second { width: 600px; height: 500px; background-color: green; } </style> </head> <body> <div id="top" style="z-index:-4;"></div> <div style="top: 10px;"></div> <div style="top: 20px;"> <div id="second" style="top: -400px;"></div> </div> </body> </html>