title: How to Make Fix Position Like Facebook Promote Side bar
body: <p>Hello All Brother and Sister!!
  I want to Make a Side Bar That We Scroll Down like my Image</p>
  
  <p><img src="https://i.stack.imgur.com/w2wbc.png" alt="enter image description here"></p>
  
  <p><strong>And Then it Fix Like This</strong></p>
  
  <p><img src="https://i.stack.imgur.com/7bhTF.png" alt="enter image description here"></p>
  
  <p>Thanks In advance</p>