use style tag with bootstrap code example
Example 1: html style tag
<html>
<head>
<style>
h1 {color:red;}
p {color:blue;}
</style>
</head>
<body>
<h1>A heading</h1>
<p>A paragraph.</p>
</body>
Example 2: html style tag
<html>
<body>
<!-- BODY HTML -->
</body>
<head>
<!-- HEAD HTML -->
</head>
<style>
/* CSS */
</style>