<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Float experiment</title> <style> .box { width: 400px; height: 400px; background-color: #000; opacity: 0.3; } .box:first-child { float: left; } </style> </head> <body> <div class="box"> </div> <div class="box"> </div> <div class="box"> </div> </body> </html>
