<!DOCTYPE HTML> <html> <body style="width: 600px; height: 400px;"> <div style="position: absolute; left: 0px; top: 0px; width=600px height=600px"> <div style="position: absolute; left: 0px; top: 0px; width: 600px; height: 400px; background-color: green;"></div> <div style="position: absolute; left: 300px; top: 400px; width: 100px; height: 100px; background-color: red;"></div> <div style="position: absolute; left: 0px; top: 500px; width: 600px; height: 100px; background-color: yellow;"></div> </div> </body> </html>