Godot Grass Shader to Add Colour and Wind

shader_type spatial;
// Show rear-facing grass
render_mode cull_disabled, world_vertex_coords;

// Grass Colour Shader
uniform vec3 colour: source_color;
uniform vec3 colour2: source_color;
uniform sampler2D noise2;
uniform float noiseScale = 20.0;

varying vec3 worldPos;

//  Godot Simple Wind Vertex Shader
group_uniforms wind;
uniform sampler2D noise_tex;
uniform float wind_speed = .1;
uniform float wind_strength = .2;

void vertex() {
    // Called for every vertex the material is visible on.
    worldPos = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;

    float offset = TIME * wind_speed;
    float noise = texture(noise_tex, NODE_POSITION_WORLD.xz-offset).r;
    noise -= .5;
    noise *= wind_strength;
    VERTEX.x += noise * length(VERTEX.y - NODE_POSITION_WORLD.y) * length(VERTEX.xz);
}

void fragment() {
    // Called for every pixel the material is visible on.
    vec3 noiseLevel = texture(noise2, worldPos.xz / noiseScale).rgb;
    ALBEDO = mix(colour, colour2, UV.y) * mix(colour, colour2, noiseLevel.r);
    if (!FRONT_FACING) {
        NORMAL = -NORMAL;
    }
}

//void light() {
    // Called for every pixel for every light affecting the material.
    // Uncomment to replace the default light processing function with this one.
//}