Help how to make the fluid from rest to movement

[emilyyujieli]

l have succeeded in using  emitter to emit fluid in a bucket and now l wanna set the fluid from rest to movement.Making a movement seems like the rotation effect of washing machine(imitate the effect of Newton bucket experiment ).how should l do? where can add the script？is the script add in ObiParticleRenderer？and how can make the fluid rotate with the bucket ?