The Scratch trademarks, including the Scratch name, logo, the Scratch
Cat, Gobo, Pico, Nano, Tera and Giga graphics (the "Marks"), are
property of MIT, and the use of the Marks is governed by this policy.

# Use

You may use the Marks to refer to Scratch in Substantially Unmodified
form. 

"Substantially Unmodified" means the source code provided by MIT,
possibly with minor modifications including but not limited to: bug
fixes (including security), changing the locations of files for better
integration with the host operating system, adding documentation, and
changes to the dynamic linking of libraries.

A version is not "Substantially Unmodified" if it incorporates
features not present in a release of Scratch by MIT.  If you do make a
substantial modification, to avoid confusion with versions of Scratch
produced by MIT you must remove all Marks from your version of the
software and refrain from using any of the Marks to refer to your
version.