healthy.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Healthy</title>
    <style>
        .container{
            position: relative;
        }
        .center{
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 50px;
            text-align: center;
        }
        img{
            width: 100%;
            height: auto;
            opacity: 0.3;
        }
    </style>
</head>
<body>

<div class="container">
    <button onclick="gobackclick()">goback</button>
    <img src="http://peakhealthcalgary.com/wp-content/uploads/2013/02/shutterstock_70838677.jpg">
    <div class="center">Your heart is healthy :)</div>
</div>
<script>
    function gobackclick() {
        window.location = "/";
    }
</script>
</body>
</html>