You can't really consider this as the 100% "true answer", because if you count physical technicalities, then you could also say that the cube is constantly moving towards us, as a multiple beams of light generated by the screen.
Then you could also say that the cube is moving in a complex pattern, because it can also be represented inside our brain as a series of bio-electrical signals.

But I think that what the OP meant by "Cube" was the actual abstract computer object, and not its physical graphical representation.