How to create particle morphing using the Trapcode Particular plugin like in this video for Google.

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I tried to do it, but I stopped at the point where I could only make the particles repeat the letters statically, and then I realized that everything would be much more difficult than I thought, so help me do it because I really want to repeat what the Google motion designers did.

[Rick Gerard · Accepted solution]

I don't have time to go through a thorough explanation right now, but the solution is to set your text layer as an emitter, then pre-compose the comp and use Time Remapping to reverse the particles' motion so they build the shape. 

I do not know of any particle system that will assemble a shape from random particles; they only emit from a shape.