UE4.25 Niagara Particle Attribute Reader data interface

i was reading this post on unreal engine site i could not find “Particle Attribute Reader data interface” in Niagara. anybody has any idea how to use it.

Fount it but its not working… it should take color from red particle but i think i am not using it correct way.

Finally i figured it out how to use particle attribute reader and i also made a video fish flock on youtube.