<!DOCTYPE html> <html> <head> <style type="text/css"> #separator { height: 20px; background-color: green; } #margin { height: 40px; } #float { height: 20px; width: 50px; margin-left: auto; background-color: lightgreen; } </style> </head> <body> <div id="separator"></div> <div id="margin"></div> <div id="float"></div> </body> </html>
