diff --git a/src/model.rs b/src/model.rs
index 1f81562..0c17167 100644
--- a/src/model.rs
+++ b/src/model.rs
@@ -1,208 +1,2 @@
-mod song {
-    use std::{
-        collections::{BTreeMap, VecDeque},
-        str::FromStr,
-        sync::OnceLock,
-    };
-
-    use regex::Regex;
-
-    #[derive(Debug, PartialEq, Eq)]
-    pub struct Verse {
-        // pub background: String, // url
-        pub content: String,
-    }
-
-    impl Verse {
-        fn new(content: String) -> Self {
-            Self { content }
-        }
-    }
-
-    /// Sequence of verse names.
-    pub type Plan = VecDeque<String>;
-
-    pub struct Song {
-        pub name: String,
-        pub verses: BTreeMap<String, Verse>,
-        pub other_plans: BTreeMap<String, Plan>,
-        pub default_plan: Plan,
-    }
-
-    impl Song {
-        pub fn plan(&self, plan_name: Option<String>) -> &VecDeque<String> {
-            plan_name
-                .map(|plan_name| {
-                    self.other_plans
-                        .get(&plan_name)
-                        .unwrap_or(&self.default_plan)
-                })
-                .unwrap_or(&self.default_plan)
-        }
-    }
-
-    #[derive(Debug)]
-    pub struct SourceRef {
-        line_number: usize,
-    }
-
-    #[derive(Debug)]
-    pub enum SongParseError {
-        EmptyString,
-        InvalidMetadata(SourceRef),
-    }
-
-    impl FromStr for Song {
-        type Err = SongParseError;
-
-        fn from_str(s: &str) -> Result<Self, Self::Err> {
-            if s == "" {
-                return Err(SongParseError::EmptyString);
-            }
-
-            static HUNK_REGEX: OnceLock<Regex> = OnceLock::new();
-            let re = HUNK_REGEX.get_or_init(|| Regex::new(r"\s*[\n\r]\s*[\n\r]\s*").unwrap());
-            let mut hunks = VecDeque::new();
-            let mut last_end: usize = 0;
-
-            for m in re.find_iter(s) {
-                hunks.push_back(&s[last_end..m.start()]);
-                last_end = m.end();
-            }
-            hunks.push_back(&s[last_end..s.len()]);
-
-            // process header
-            let mut header_lines = hunks.pop_front().unwrap().lines().map(|s| s.trim());
-            let name = header_lines.next().unwrap().trim().to_owned();
-            let mut other_plans = BTreeMap::new();
-
-            for (line_number, line) in header_lines.enumerate() {
-                if line.starts_with("plan(") {
-                    if let Some(end) = line.find(")") {
-                        match line[end..].find(":") {
-                            Some(i) => {
-                                let plan_name = &line[5..end];
-                                let entries: VecDeque<String> = line[(end + i + 1)..]
-                                    .trim()
-                                    .split(',')
-                                    .map(|s| s.trim().to_owned())
-                                    .collect();
-                                other_plans.insert(plan_name.to_owned(), entries);
-                            }
-                            None => {
-                                return Err(SongParseError::InvalidMetadata(SourceRef {
-                                    line_number,
-                                }));
-                            }
-                        }
-                    }
-                }
-                // map(band2): slide1, slide2
-                // band2: slide1, slide2
-            }
-
-            let mut verses = BTreeMap::new();
-
-            let mut default_plan = Plan::new();
-
-            // process verses
-            for hunk in hunks {
-                let mut verse_contents = hunk;
-                let end_i = hunk.find('\n').unwrap_or(hunk.len());
-                let verse_name: String = if let Some(i) = &hunk[0..end_i].find(':') {
-                    verse_contents = &hunk[end_i + 1..];
-                    String::from(&hunk[0..*i])
-                } else {
-                    format!("Generated Verse {}", verses.len() + 1).to_owned()
-                };
-                verses.insert(verse_name.clone(), Verse::new(verse_contents.to_owned()));
-                default_plan.push_back(verse_name.clone());
-            }
-
-            Ok(Self {
-                name,
-                verses,
-                other_plans,
-                default_plan,
-            })
-        }
-    }
-
-    mod test {
-        use std::collections::VecDeque;
-
-        use super::{Song, Verse};
-
-        #[test]
-        fn parses_simple_song() {
-            let song: Song = r#"Song Title
-                
-                A verse"#
-                .parse()
-                .unwrap();
-
-            assert_eq!(song.name, "Song Title");
-            assert_eq!(
-                song.verses.get("Generated Verse 1"),
-                Some(&Verse {
-                    content: "A verse".to_owned()
-                })
-            );
-            assert_eq!(song.verses.len(), 1);
-            assert_eq!(song.default_plan[0], "Generated Verse 1");
-            assert_eq!(song.default_plan.len(), 1);
-        }
-
-        #[test]
-        fn parses_song_with_plan() {
-            let song: Song = r#"Song Title
-                plan(another_plan): Generated Verse 1, Generated Verse 1, Generated Verse 1
-                
-                A verse"#
-                .parse()
-                .unwrap();
-
-            assert_eq!(song.name, "Song Title");
-            assert_eq!(
-                song.verses.get("Generated Verse 1"),
-                Some(&Verse {
-                    content: "A verse".to_owned()
-                })
-            );
-            assert_eq!(song.verses.len(), 1);
-            assert_eq!(song.default_plan[0], "Generated Verse 1");
-            assert_eq!(song.default_plan.len(), 1);
-            dbg!(&song.other_plans);
-            assert_eq!(
-                song.other_plans.get("another_plan"),
-                Some(&VecDeque::from(vec![
-                    "Generated Verse 1".to_owned(),
-                    "Generated Verse 1".to_owned(),
-                    "Generated Verse 1".to_owned()
-                ]))
-            );
-        }
-    }
-}
-
-mod display {
-    use super::song::{Plan, Song};
-
-    pub struct PlaylistEntry {
-        pub song: Song,
-        pub map: Plan,
-    }
-
-    pub struct PlaylistVerseRef {
-        pub song_index: usize,
-        pub song_map: String,
-        pub map_verse_index: usize,
-    }
-
-    pub struct Display {
-        pub playlist: Vec<(Song, Option<String>)>,
-        pub current: PlaylistVerseRef,
-        pub frozen_at: Option<PlaylistVerseRef>,
-        pub blanked: bool,
-    }
-}
+mod display;
+mod song;
diff --git a/src/model/display.rs b/src/model/display.rs
new file mode 100644
index 0000000..450e8e7
--- /dev/null
+++ b/src/model/display.rs
@@ -0,0 +1,19 @@
+use super::song::{Plan, Song};
+
+pub struct PlaylistEntry {
+    pub song: Song,
+    pub map: Plan,
+}
+
+pub struct PlaylistVerseRef {
+    pub song_index: usize,
+    pub song_map: String,
+    pub map_verse_index: usize,
+}
+
+pub struct Display {
+    pub playlist: Vec<(Song, Option<String>)>,
+    pub current: PlaylistVerseRef,
+    pub frozen_at: Option<PlaylistVerseRef>,
+    pub blanked: bool,
+}
diff --git a/src/model/song.rs b/src/model/song.rs
new file mode 100644
index 0000000..42f8d47
--- /dev/null
+++ b/src/model/song.rs
@@ -0,0 +1,222 @@
+use std::{
+    collections::{BTreeMap, VecDeque},
+    str::FromStr,
+    sync::OnceLock,
+};
+
+use regex::Regex;
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct Verse {
+    // pub background: String, // url
+    pub content: String,
+}
+
+impl Verse {
+    fn new(content: String) -> Self {
+        Self { content }
+    }
+}
+
+/// Sequence of verse names.
+pub type Plan = VecDeque<String>;
+
+pub struct Song {
+    pub name: String,
+    pub verses: BTreeMap<String, Verse>,
+    pub other_plans: BTreeMap<String, Plan>,
+    pub default_plan: Plan,
+}
+
+impl Song {
+    pub fn plan(&self, plan_name: Option<String>) -> &VecDeque<String> {
+        plan_name
+            .map(|plan_name| {
+                self.other_plans
+                    .get(&plan_name)
+                    .unwrap_or(&self.default_plan)
+            })
+            .unwrap_or(&self.default_plan)
+    }
+}
+
+#[derive(Debug)]
+pub struct SourceRef {
+    line_number: usize,
+}
+
+#[derive(Debug)]
+pub enum SongParseError {
+    EmptyString,
+    InvalidMetadata(SourceRef),
+}
+
+impl FromStr for Song {
+    type Err = SongParseError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if s == "" {
+            return Err(SongParseError::EmptyString);
+        }
+
+        static HUNK_REGEX: OnceLock<Regex> = OnceLock::new();
+        let re = HUNK_REGEX.get_or_init(|| Regex::new(r"\s*[\n\r]\s*[\n\r]\s*").unwrap());
+        let mut hunks = VecDeque::new();
+        let mut last_end: usize = 0;
+
+        for m in re.find_iter(s) {
+            hunks.push_back(&s[last_end..m.start()]);
+            last_end = m.end();
+        }
+        hunks.push_back(&s[last_end..s.len()]);
+
+        // process header
+        let mut header_lines = hunks.pop_front().unwrap().lines().map(|s| s.trim());
+        let name = header_lines.next().unwrap().trim().to_owned();
+        let mut other_plans = BTreeMap::new();
+
+        for (line_number, line) in header_lines.enumerate() {
+            if line.starts_with("plan(") {
+                if let Some(end) = line.find(")") {
+                    match line[end..].find(":") {
+                        Some(i) => {
+                            let plan_name = &line[5..end];
+                            let entries: VecDeque<String> = line[(end + i + 1)..]
+                                .trim()
+                                .split(',')
+                                .map(|s| s.trim().to_owned())
+                                .collect();
+                            other_plans.insert(plan_name.to_owned(), entries);
+                        }
+                        None => {
+                            return Err(SongParseError::InvalidMetadata(SourceRef { line_number }));
+                        }
+                    }
+                }
+            }
+            // map(band2): slide1, slide2
+            // band2: slide1, slide2
+        }
+
+        let mut verses = BTreeMap::new();
+
+        let mut default_plan = Plan::new();
+
+        // process verses
+        for hunk in hunks {
+            let mut verse_contents = hunk;
+            let end_i = hunk.find('\n').unwrap_or(hunk.len());
+            let verse_name: String = if let Some(i) = &hunk[0..end_i].find(':') {
+                verse_contents = &hunk[end_i + 1..];
+                String::from(&hunk[0..*i])
+            } else {
+                format!("Generated Verse {}", verses.len() + 1).to_owned()
+            };
+            verses.insert(verse_name.clone(), Verse::new(verse_contents.to_owned()));
+            default_plan.push_back(verse_name.clone());
+        }
+
+        Ok(Self {
+            name,
+            verses,
+            other_plans,
+            default_plan,
+        })
+    }
+}
+
+mod test {
+    use std::collections::VecDeque;
+
+    use super::{Song, Verse};
+
+    #[test]
+    fn parses_simple_song() {
+        let song: Song = r#"Song Title
+                
+                A verse"#
+            .parse()
+            .unwrap();
+
+        assert_eq!(song.name, "Song Title");
+        assert_eq!(
+            song.verses.get("Generated Verse 1"),
+            Some(&Verse {
+                content: "A verse".to_owned()
+            })
+        );
+        assert_eq!(song.verses.len(), 1);
+        assert_eq!(song.default_plan[0], "Generated Verse 1");
+        assert_eq!(song.default_plan.len(), 1);
+    }
+
+    #[test]
+    fn parses_song_with_plan() {
+        let song: Song = r#"Song Title
+                plan(another_plan): Generated Verse 1, Generated Verse 1, Generated Verse 1
+                
+                A verse"#
+            .parse()
+            .unwrap();
+
+        assert_eq!(song.name, "Song Title");
+        assert_eq!(
+            song.verses.get("Generated Verse 1"),
+            Some(&Verse {
+                content: "A verse".to_owned()
+            })
+        );
+        assert_eq!(song.verses.len(), 1);
+        assert_eq!(song.default_plan[0], "Generated Verse 1");
+        assert_eq!(song.default_plan.len(), 1);
+        dbg!(&song.other_plans);
+        assert_eq!(
+            song.other_plans.get("another_plan"),
+            Some(&VecDeque::from(vec![
+                "Generated Verse 1".to_owned(),
+                "Generated Verse 1".to_owned(),
+                "Generated Verse 1".to_owned()
+            ]))
+        );
+    }
+
+    #[test]
+    fn parses_song_with_verse_ref() {
+        let song: Song = r#"Title
+
+
+
+                v1:
+                v1
+                
+
+                v2:
+                v2
+                
+                (v2)
+                
+                (v1)"#
+            .parse()
+            .unwrap();
+
+        assert_eq!(song.name, "Song Title");
+        assert_eq!(
+            song.verses.get("Generated Verse 1"),
+            Some(&Verse {
+                content: "A verse".to_owned()
+            })
+        );
+        assert_eq!(song.verses.len(), 1);
+        assert_eq!(song.default_plan[0], "Generated Verse 1");
+        assert_eq!(song.default_plan.len(), 1);
+        dbg!(&song.other_plans);
+        assert_eq!(
+            song.other_plans.get("another_plan"),
+            Some(&VecDeque::from(vec![
+                "Generated Verse 1".to_owned(),
+                "Generated Verse 1".to_owned(),
+                "Generated Verse 1".to_owned()
+            ]))
+        );
+    }
+}