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extern crate ansi_term;
use ansi_term::Colour;
// This example prints out the 256 colours.
// They're arranged like this:
//
// - 0 to 8 are the eight standard colours.
// - 9 to 15 are the eight bold colours.
// - 16 to 231 are six blocks of six-by-six colour squares.
// - 232 to 255 are shades of grey.
fn main() {
// First two lines
for c in 0..8 {
glow(c, c != 0);
print!(" ");
}
print!("\n");
for c in 8..16 {
glow(c, c != 8);
print!(" ");
}
print!("\n\n");
// Six lines of the first three squares
for row in 0..6 {
for square in 0..3 {
for column in 0..6 {
glow(16 + square * 36 + row * 6 + column, row >= 3);
print!(" ");
}
print!(" ");
}
print!("\n");
}
print!("\n");
// Six more lines of the other three squares
for row in 0..6 {
for square in 0..3 {
for column in 0..6 {
glow(124 + square * 36 + row * 6 + column, row >= 3);
print!(" ");
}
print!(" ");
}
print!("\n");
}
print!("\n");
// The last greyscale lines
for c in 232..=243 {
glow(c, false);
print!(" ");
}
print!("\n");
for c in 244..=255 {
glow(c, true);
print!(" ");
}
print!("\n");
}
fn glow(c: u8, light_bg: bool) {
let base = if light_bg { Colour::Black } else { Colour::White };
let style = base.on(Colour::Fixed(c));
print!("{}", style.paint(&format!(" {:3} ", c)));
}