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: shades_of_grey.rs
    path of file: ./repos/bracket-lib/bracket-color/examples
    
    the code of the file until where you have to start completion: use bracket_color::prelude::*;
use std::io::{stdout, Write};
use util::print_color;

fn main() {
    for color in RgbLerp::new(RGB::named(RED), RGB::named(YELLOW), 20) {
        print_color(color.to_greyscale(), "You've got to lerp it, gray it.\n");
    }
    for color in RgbLerp::new(RGB::named(GREEN), RGB::named(MAGENTA), 20) {
        print_color(
            color.desaturate(),
    
fn main() {
    for color in RgbLerp::new(RGB::named(RED), RGB::named(YELLOW), 20) {
        print_color(color.to_greyscale(), "You've got to lerp it, gray it.\n");
    }
    for color in RgbLerp::new(RGB::named(GREEN), RGB::named(MAGENTA), 20) {
        print_color(
            color.desaturate(),
            "You've got to lerp it, desaturate it and ruin the joke.\n",
        );
    }

    print_color(RGB::named(WHITE), "\nAnd back to white.\n");

    stdout().flush().expect("Flush Fail");
}