extern crate chalk_rs;
use chalk_rs::Chalk;

use std::convert::TryInto;

fn main() {
	let line_length = 78;

	// foreground colors
	let mut chalk = Chalk::new();
	for i in 0..line_length {
		let r: u16 = 255 - (i * 255 / line_length);
		let mut g: u16 = i * 510 / line_length;
		let b: u16 = i * 255 / line_length;
		if g > 255 {
			g = 510 - g;
		}
		chalk.rgb(
			r.try_into().unwrap(),
			g.try_into().unwrap(),
			b.try_into().unwrap(),
		);
		if i % 3 == 0 {
			chalk.print(&'r');
		}
		if i % 3 == 1 {
			chalk.print(&'g');
		}
		if i % 3 == 2 {
			chalk.print(&'b');
		}
	}

	println!();

	// background color
	chalk.default_color();
	for i in 0..line_length {
		let r: u16 = 255 - (i * 255 / line_length);
		let mut g: u16 = i * 510 / line_length;
		let b: u16 = i * 255 / line_length;
		if g > 255 {
			g = 510 - g;
		}
		chalk.bg_rgb(
			r.try_into().unwrap(),
			g.try_into().unwrap(),
			b.try_into().unwrap(),
		);
		if i % 3 == 0 {
			chalk.print(&'r');
		}
		if i % 3 == 1 {
			chalk.print(&'g');
		}
		if i % 3 == 2 {
			chalk.print(&'b');
		}
	}

	println!();
}