Apple Motion: Creating 2D wave texture

Hello!

I need to create a wave animation in Apple Motion for a 3D model material (a video material).

I’m trying to figure out how to create a wave that animates. It just needs to be all white or varying opacity and it needs to animate multiple little blob of foam.

Here’s a reference image:

Look at the white texture. I am trying to create something either with particles, generators and other ways of creating content inside Motion.

Should I just create everything in Bézier paths and manually update their keyframes?

I am on an urgent deadline, so I really need some help on this.

Thanks for the help!