Step 01 : Type the posts till you want to add HTML text area.



Step 02 : Then Click "Edit HTML" Tab

Step 03 : Paste Following code to the bottom

<textarea name="code" rows="2" cols="50" style="background: #EFF5FB; color: #000; border: 1px solid #ccc; border-left: 20px solid #0174DF; line-height: 1.5em; padding: 5px; -moz-border-radius: 7px;"> TYPE YOUR TEXT AREA IN HERE

Step o4 : You Can type what you want to display inside the HTML text area ,to do that Replace the
               " TYPE YOUR TEXT AREA IN HERE ".in the code