historyBack.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>historyBack</title>
    <style>
        .demo, .demo1{
            width : 20vw;
            height: 10vw;
            border: 2px solid black;
            border-radius: 5px;
        }
    </style>
</head>
<body>
    <button onclick="goBack()">Go Back</button>
    <a href="i.html">return</a>
    <h1 id="heading">Color going to change after click</h1>
    <label for="colorModify">color: </label>
    <input type="text" name="colorModify" id="colorModify" placeholder="red">
    <button onclick="changeColor()">click to change color</button>
    <br>
    <br>
    <label for="Para">enter data to put in para box: </label>
    <input type="text" name="Para" id="Para">
    <button onclick="submit()">submit</button>
    <br>
    <p class="demo" ></p>
    <br>
    <p class="demo1" ></p>
    <br>
    <p class="demo1" ></p>
</body>
<script src="s.js"></script>
</html>