Use the given codes below to add a text box in your blog or website.
First code:
A text box without background colour
<textarea style="WIDTH: 332px; HEIGHT: 70px" onfocus="this.select();" name="textarea" cols="14">PUT CONTENT HERE</textarea>
Second code:
A text box with background colour
<textarea rows="10" cols="40" style="background:#6699ff;">PUT CONTENT HERE</textarea>
How to install a code
Copy a code above, go to your blog and create a post, switch to HTML view/mode then paste the code at any place you want a box to appear. Switch back to compose mode and add your text in a box.