let classical_music_journey = || { let theories = vec!["harmony", "rhythm", "texture"]; for theory in theories.iter() { println!("exploring theory: {}", theory); } let mut attention = "pay no attention to distractions".to_string(); let prearrival_tasks = vec!["tune instrument", "warm up"]; for task in prearrival_tasks.iter() { println!("complete prearrival task: {}", task); } println!("always start from the initial point of understanding and appreciation for classical music; exploring genres is not permitted until the basics are well understood."); };