<!DOCTYPE html> <meta charset="utf-8"> <title>CSS Flexbox Test Reference File</title> <link rel="author" title="Intel" href="http://www.intel.com"> <style> div { background-color: green; height: 25px; width: 100px; } </style> <body> <p>Test passes if there is a filled green square and no red, the number within square is '1 2 3 4' from top to bottom.</p> <div>1</div> <div>2</div> <div>3</div> <div>4</div> </body>