First Example
- CSS stands for Case Cading style sheet.
 - CSS used to define and display html elements.
 - CSS manage layout and UI mangagment in Html elements.
 - CSS is mainly used to design the websites.
 
HTML Basic
<!DOCTYPE html>
<html>
<head>
  <title></title>
</head>
<body>
  <h1>Code family</h1>
</body>
</html>
CSS:
h1{
  background-color:red;
}
body{
  background-color:blue;
}