How do i make it so particles go in circle?

For exapmple i want to make a bunch of butterflies circling around the flower, so what must i do? I tried to play with the Velocity over Lifetime but the best i can is to make them go back and forth but not in perfect circle.

And is it possible to do it without scripting?

I’m inexperienced with the ParticleSystem having only had to use it a couple of times. A little bit of play and the following settings give a rough circle. Start with a new game object, attach a particle system, then set as follows:

It’s late, but may be it’ll helps to someone. Use shape and velocity settings together and your particles will move around your circle or donut.