<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>game</title> <style type="text/css"> body { padding: 1em 0; background-color: darkgray; } #gameCanvas { border: 4px solid #E6CDF7; margin: 0 auto; display: block; background-color: #E0F8CF; } </style> </head> <body> <canvas id="gameCanvas" width="800" height="600"></canvas> <script type="text/javascript" src="game.js"></script> </body> </html>