EL71 How write new software from bases?

[KanekS]

Hello! Sorry for my English, but I'm from Poland.
You can to write in English or czech.

Sorry for my idiotic idea, but there now I want to know:

How write new software from bases, line of code after line?
In what programme? In what programming "language" ?
I want to write for this telephone my new operates system.


Please, don't laugh of me.

[mart22]

I would like to find out it also.

[KanekS]

I see that I am not alone.

EDIT: how can I write game java on el71?
In what programme? In what programming "language" ?