index.html

<!DOCTYPE html>
<html>
<head>
    <title>WEB1 - Welcome</title>
    <meta charset="utf-8">
    <style>
        #gridIndex {
            display : grid;
            grid-template-columns: 150px 150px 1fr;

        }
    </style>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
    <script src="colors.js"></script>
</head>
<body>
    <h1><a href="index.html">WEB</a></h1>
    <input type="button" value="night" onclick="
        nightDayHandler(this);    
    ">
    <div id="gridIndex">
        <ol>
            <li><a href="1.html">HTML</a></li>
            <li><a href="2.html">CSS</a></li>
            <li><a href="3.html">JavaScript</a></li>
        </ol>
        <ul>
            <li>egoing</li>
            <li>k8805</li>
            <li>youbin</li>
        </ul>
        <div>
            <h2>WEB이란 무엇인가?</h2>
            <p>Web is a computer programming system created by Donald E. Knuth as the first implementation of what he called "literate programming": the idea 
            that one could create software as works of literature, by embedding source code inside descriptive text, rather than the reverse (as is common practice in most programming languages), in an order that is convenient for exposition to human readers, rather than in the order demanded by the compiler.[1]
            </p>
        </div>
    </div>
</body>
</html>