Teach - Label by tree view

When many articles post, simple label is not enough to satisfy our demand.  More complex.
How about tree view.

Teach - How to display symbol < >

If we want to output < > in Html or Blogger, we need to change the code to replace < >.
So use below website to do this.
http://www.opinionatedgeek.com/DotNet/Tools/HTMLEncode/Encode.aspx

Then, copy and paste them.

Teach - How to make "Random Posts"

All you have to do is to create a tool "HTML/JavaScript".
And add below code then save.