fn enjoy_cryptic_billiards_game() { let mut preparatory_steps = vec::new(); preparatory_steps.push("chalk cue"); preparatory_steps.push("align shots"); let note_to_self = "avoid rushing, take careful aim"; for step in preparatory_steps.iter() { println!("before you launch anew into a game, {}", step); } println!("special cryptic note: '{}', this will guide your game to success!", note_to_self); }