You need to write a scratchblocks code line by line. Press space to write a line. Blocks that contain "<" or ">" will not work, as the project will think that those characters are part of a boolean reporter... Notice that some blocks that work perfectly fine inside a scratchblocks tag may not work here. This is case sensitive, so you must write "when gf clicked", "When GF clicked" will not work. There are also some other restrictions (for example, "say[]' will not work, but "say []" will). Oh, yeah, //category=something also doesn't work =P
http://scratch.mit.edu/projects/15989796/ =3