QGIS geometry generator expression for creating an animated wave effect

wave.txt

-- qgis geometry generator expression
-- to be used in water polygon layer
-- water polygons must be in a projected CRS
-- enable animation on the layer
-- change geometry generator geometry type to linestring
intersection(
    $geometry, 
    translate(
	wave_randomized(
            collect_geometries(
                array_foreach(
                    generate_series( 0, y_max($geometry) - y_min($geometry) + 40000, 20000 ),
                    offset_curve(
                        make_line(
                            point_n(nodes_to_points ( bounds ( buffer( $geometry , 30000) ) ), 1 ),
                            point_n( nodes_to_points ( bounds ( buffer( $geometry , 30000) ) ), 2 )
                        ),
                        @element
                    )
                )
            ),
            20000, 20000,
            2000, 4000
        ),
    @symbol_frame % 50 * 1000,
    0)
)