What good are pre-made templates they are never exactly what you want
You can also download the syntax highlighting part on the example page that you provided!
I made a 5 second one if you want it although it only works for html and it has no layout or colours just the basics, a text box, a go button and then the end result all on one page.
Remember rename it to .php and if you are going to change the file name also edit the link inside the code! textpost.txt