animate text

main.rs

use std::io::{self, Write};
use std::time::{Instant, Duration};
use std::thread;

fn main() {
    let time: Instant = Instant::now();
    let text: &str = "Marhaban ya Ramadhan";
    let mut is_up: bool = true;
    let mut current_index: usize = 0;

    (0..).take_while(|_| time.elapsed().as_secs() < 4)
        .for_each(|_| {
            let output: String = format!( "{}{}",
                " ".repeat(current_index),
                text.chars()
                    .nth(current_index)
                    .unwrap()
            );

            print!("{}\r", output);

            io::stdout()
                .flush()
                .unwrap();

            if is_up {
                current_index += 1
            } else {
                current_index -= 1
            };

            if current_index == 0 || current_index == text.len() - 1 {
                is_up = !is_up;
            }

            thread::sleep(Duration::from_millis(105));
        });

    println!("{}", text);
}