I am trying to write a function for a button. I helped someone before in deluge and I'm using this new editor I'm not familiar with - I guess it is new. Why is the default code statically typed? The editor will not let me create a variable without a type.

I guess this is obviously not the deluge programming language. Why does it say deluge on the bottom right of the screenshot? Maybe I'm tired. If it not deluge, can someone tell me what language I need to be programming in?