Hologram Problem??

I’m trying to recreate my own version of the the hologram you see in Star Wars the Clone Wars Season 4 Episode 7-8.
It’s the cube hologram of Obi-wan Kenobi.
I want to know how to get the cubes going from the bottom of the character (swirling around in a circle) and then fly up to form the characters shape.
Does anyone have any idea of how to do that??
Here’s what I have so far.
This is what I want it to look like once the particles have formed the shape of the character

Here is an update on the hologram animation.

I’ve still got to figure out how to from them into a character though.