Where do i place the sin() formula for plane geometry to create a three.js particle wave?

Question

pictureim trying to create a particle wave effect in three.js , losing my mind as i tried different methods. anyone have an idea what i could do? my code is down below.

 // geomatry, material, mesh
    const geometry = new THREE.PlaneBufferGeometry(5, 5, 64, 64)

    const material = new THREE.PointsMaterial({color: 'aqua', 
    size: 0.007})

    const particles = new THREE.Points(geometry, material);
    particles.rotation.x = 181;

    scene.add(particles);

    // Lighting
    const light = new THREE.PointLight(0xffffff, 2)
    light.position.set(2, 3, 4);
    scene.add(light);


    const render = function() {
        requestAnimationFrame(render)
        
        
        //  particles.rotation.z += .005

        renderer.render(scene,camera);
    }