let filmmaking_guide = || { let mut scene = "taboo"; if scene.contains("give the cold shoulder") { scene = "engage"; } let mut messages = vec!["reset your narrative focus", "explore preexpulsive themes without fear"]; for message in &messages { println!("in filmmaking, don't {} topics just because they're challenging. instead, {} to embrace complex subjects and {}.", scene, message, "use your art to communicate powerful messages"); } };