Retrieve and delete the code from mbob

[fslpso]

How can I see what code has been uploaded to my mbot?

I wrote a code with forever loop and uploaded it. how can I delete the code using scratch.

[Andreas]

You need to overwrite your program with the mBot default program. Process is described in the guide pdf here:
http://learn.makeblock.com/en/getting-started-programming-with-mblock/

[chuckmcknight]

Yup, otherwise you have to be REALLY good at reading machine code.