<html>
<head>
<link href="https://unpkg.com/tailwindcss@^1.0/dist/tailwind.min.css" rel="stylesheet">
<link rel="stylesheet" href="index.css">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app" class="bg-blue-300 flex flex-col justify-center items-center h-screen w-full
text-sm">
<div class="w-20 h-20 bg-red-700"> </div>
</div>
<script>
var app = new Vue({
el: '#app',
data: {
}
});
</script>
</body>
</html>