Cubefield Make A Stage Where Is The Source For The Cubes In Cubefield?

Where is the source for the cubes in Cubefield? - cubefield make a stage

Therefore I make a Flash project for the Christmas tradition and IT in general, it is our teachers face on a sign. I'm trying to redo Cubefield much with cubic ... I looked through the ActionScript files to try to replace the cubic, but can not find something like that. Can anyone help?