title: how to draw a rectangle in HTML or CSS?
body: <p>I am trying to draw a rectangle and I found the website for css code(<a href="http://css-tricks.com/examples/ShapesOfCSS/">http://css-tricks.com/examples/ShapesOfCSS/</a>). How do I put together in HTML? In other words, how do I define #rectangle in HTML.</p>
  
  <p>Facebook always has blue rectangle at the top of each page. What is the best way to achieve like them?</p>
  
  <p>I appreciate if someone could help me.</p>