<!DOCTYPE HTML> <style type="text/css"> html, body { margin: 0; padding: 0; border: none; } </style> <div style="position: absolute; width: 200px; height: 400px; top: 100px; left: 100px; box-shadow: 0 0 14px blue">A</div> <div style="position: absolute; width: 100px; height: 400px; top: 100px; left: 400px; box-shadow: 0 0 14px blue">B</div>