Press the space bar to toggle between the two different effects! This project uses bitmap sprites to increase performance. If you want the text to say something else, you can change costume1 in the Text sprite to the vector format, delete what's already there and type whatever text you want, then switch back to bitmap. After that, add a single black pixel on either corner of the sprite window so that the effect covers the entire screen instead of just a portion.
This is a replication of an effect used by Mathis R.V in parts 11 and 12 of his fictional googology series. This specifically replicates Super-Duplication Level [Ω] of Part XII.