printing error

use std::io;
use std::cmp::Ordering;
use rand::Rng;


fn main(){

    let array: [u8; 5] = rand::random();
    let index = rand::thread_rng().gen_range(0..5);
    let secret_number = array[index];

    loop{
        println!("Input your guess");
        let mut guess = String::new();

    io::stdin()
        .read_line(&mut guess)
        .expect("Fail");

    let guess: u8 = match guess.trim().parse(){
        Ok(num) => num,
        Err(_) => {
            println!("Wrong type of input");
            continue;
        }
    };

    println!("You guessed: {}", guess);

    match guess.cmp(&secret_number){
        Ordering::Less => println!("Too small"),
        Ordering::Greater => println!("Too big"),
        Ordering::Equal => {
            println!("You win");
            println!("array items {}", array[index]);
            elements(index.try_into().unwrap(), array);
            break;
        }
    };
    };
}

fn elements(i:u8, arr:[u8;5]){
    loop {
        if i > 0 {
        println!("array element {}", arr[i]);
        i -= i;
        }   else {
                break;
            }
    };
}