I believe it had a name similar to ScriptX. It was like a chatroom, but to the left of the chatroom it had an editable programming box. It was a very smooth, easy interface. Any ideas of what it was?
I googled for a minute for ScriptX but couldn't find anything so I'm going to recommend Koding. http://www.koding.com/
I'm not sure if it's the same as it was when I went on it, but it's really for people to learn programming. For programmers it's not very useful. The only thing I didn't like about koding is the fact that they use jQuery effects for everything. Most programmers like their 'assets' to be quick and efficient - which koding is but instead of just showing a dialog box they fade it in slowly and tediously. This grinds my gears.
You're question is very confusing. The above posts have provided links to help you learn, and I can see where they get that...however I feel like you may have asked what it was coded from which confuses me even more.
Please be more specific in what you're asking please.