You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: footsteps.rs
    path of file: ./repos/rusty_art/src
    
    the code of the file until where you have to start completion: use nannou::prelude::*;
use nannou_egui::{self, egui, Egui};



fn main() {
    nannou::app(model).update(update).run();
}

struct Model {
    counter: f32,
    stripes_visible: bool,
    egui: Egui,
    settings: Settings,
}

struct Settings {
    STRIP_WIDTH: f32,
    BLOCK_WIDTH: f32,
    BLOCK_HEIGHT: f32,
    Y_YELLOW: f32,
    Y_BLUE: f32,
    SPEED: f32,
}



fn model(app: &App) -> Model {
    let window_id = app
        .new_window()
        .view(view)
        .raw_event(raw_window_event)
        .build()
        .unwrap();
    let window = app.window(window_id).unwrap();
    let egui = Egui::from_window(&window);
     Model { counter: 0.0, 
        stripes_visible: true,
        egui,
        settings: Settings {
            STRIP_WIDTH: 7.0,
            BLOCK_WIDTH: 44.0,
            BLOCK_HEIGHT: 30.0,
            Y_YELLOW: 40.0,
            Y_BLUE: 180.0,
            SPEED: 0.04,
        },
}
}

fn update(app: &App, model: &mut Model, _update: Update) {
    let egui = &mut model.egui;
    let _sett
    
fn update(app: &App, model: &mut Model, _update: Update) {
    let egui = &mut model.egui;
    let _settings = &model.settings;
    egui.set_elapsed_time(_update.since_start);
    let ctx = egui.begin_frame();
    egui::Window::new("Settings").show(&ctx, |ui| {
        ui.label("STRIP_WIDTH:");
        ui.add(egui::Slider::new(
            &mut model.settings.STRIP_WIDTH,
            0.0..=100.0,
        ));
        ui.label("BLOCK_WIDTH:");
        ui.add(egui::Slider::new(
            &mut model.settings.BLOCK_WIDTH,
            0.0..=100.0,
        ));
        ui.label("BLOCK_HEIGHT:");
        ui.add(egui::Slider::new(
            &mut model.settings.BLOCK_HEIGHT,
            0.0..=100.0,
        ));
        ui.label("Y_YELLOW:");
        ui.add(egui::Slider::new(
            &mut model.settings.Y_YELLOW,
            0.0..=100.0,
        ));
        ui.label("Y_BLUE:");
        ui.add(egui::Slider::new(
            &mut model.settings.Y_BLUE,
            0.0..=100.0,
        ));
        ui.label("SPEED:");
        ui.add(egui::Slider::new(
            &mut model.settings.SPEED,
            0.0..=1.0,
        ));
    });

    let SPEED = model.settings.SPEED;

    model.counter += SPEED;
    if model.counter >= app.window_rect().w() {
        model.counter = 0.0;
    }
    if app.mouse.buttons.left().is_down() {
        model.stripes_visible = false;
    }
    if app.mouse.buttons.left().is_up() {
        model.stripes_visible = true;
    }
}