Trying to format - need help

Hi, I placed the CodeMirror like this:

var myCodeMirror = CodeMirror.fromTextArea(document.getElementById(‘txt1’), {
mode : ‘mixedMode’
, lineNumbers : true
, readOnly : true })

and you can see it here:

How do I format it, like green bars, width, height, and formating?
It just shows all black.

Help plz. I read the docs 2x.

There is no mode called mixedMode in the distribution, and it looks like you’re not loading any modes at all on that page.

What mode should I use for html?
The list of modes is all caps, is that the format?
What do you mean - ‘load’?

How do I size height and width?
And how do I add greenbar?