<!DOCTYPE html> <html lang="ja"> <head> <title>Hello Hello Hello</title> <script src="dbl.js"></script> <style> body {background: #eef;} </style> </head> <body> <h1>Hello</h1> <p>Hello, world!!</p> <p>Hello, world!!</p> <p>Hello, world!!</p> </body> </html>