diff --git a/Cargo.toml b/Cargo.toml
index 1298cad..99aaf65 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,7 @@ default = ["zip"]
 zip = ["dep:zip"]
 
 [dependencies]
+getset = "0.1.2"
 serde = { version = "1.0.197", features = ["derive"] }
 serde_json = "1.0.114"
 zip = { version = "0.6.6", default-features = false, features = ["deflate", "time"], optional = true }
diff --git a/README.md b/README.md
index e987aff..31f339b 100644
--- a/README.md
+++ b/README.md
@@ -15,13 +15,10 @@ let mut dp = Datapack::new("shulkerpack", 20) // Create a new datapack with the
     .with_supported_formats(16..=20) // Add the supported formats of the datapack
     .with_template_folder(Path::new("./template")) // Add a template folder to the datapack. This will include all files in the template folder in the root of the datapack and can be used for including the "pack.png" file
     .unwrap();
-let mut namespace = Namespace::new("shulker"); // Create a new namespace with the name "shulker"
+let namespace = datapack.namespace_mut("shulker"); // Create a new namespace with the name "shulker"
 
-let mut hello_function = Function::new(); // Create a new function
-hello_function.add_command("say Hello, world!".into()); // Add a command to the function
-namespace.add_function("hello", hello_function); // Add the function to the namespace
-
-dp.add_namespace(namespace); // Add the namespace to the datapack
+let hello_function = namespace.function_mut("hello"); // Create a new function
+hello_function.add_command("say Hello, world!"); // Add a command to the function
 
 let v_folder = dp.compile(&CompileOptions::default()); // Compile the datapack with default options
 
diff --git a/src/datapack/command/execute.rs b/src/datapack/command/execute.rs
index db2d746..b58679e 100644
--- a/src/datapack/command/execute.rs
+++ b/src/datapack/command/execute.rs
@@ -1,9 +1,12 @@
-use std::ops::{BitAnd, BitOr, Not};
+use std::ops::{BitAnd, BitOr, Deref, Not};
 
 use serde::{Deserialize, Serialize};
 
+use crate::util::compile::{CompileOptions, MutCompilerState, MutFunctionCompilerState};
+
 use super::Command;
 
+#[allow(missing_docs)]
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum Execute {
     Align(String, Box<Execute>),
@@ -18,10 +21,228 @@ pub enum Execute {
     Rotated(String, Box<Execute>),
     Store(String, Box<Execute>),
     Summon(String, Box<Execute>),
-    If(Condition, Box<Execute>),
-    Run(String, Box<Command>),
+    If(Condition, Box<Execute>, Option<Box<Execute>>),
+    Run(Box<Command>),
+    Runs(Vec<Command>),
 }
 
+impl Execute {
+    /// Compile the execute command into a list of strings.
+    pub fn compile(
+        &self,
+        options: &CompileOptions,
+        global_state: &MutCompilerState,
+        function_state: &MutFunctionCompilerState,
+    ) -> Vec<String> {
+        self.compile_internal(
+            String::from("execute "),
+            false,
+            options,
+            global_state,
+            function_state,
+        )
+    }
+    fn compile_internal(
+        &self,
+        prefix: String,
+        require_grouping: bool,
+        options: &CompileOptions,
+        global_state: &MutCompilerState,
+        function_state: &MutFunctionCompilerState,
+    ) -> Vec<String> {
+        match self {
+            Self::Align(align, next) => format_execute(
+                prefix,
+                &format!("align {align} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::Anchored(anchor, next) => format_execute(
+                prefix,
+                &format!("anchored {anchor} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::As(selector, next) => format_execute(
+                prefix,
+                &format!("as {selector} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::At(selector, next) => format_execute(
+                prefix,
+                &format!("at {selector} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::AsAt(selector, next) => format_execute(
+                prefix,
+                &format!("as {selector} at @s "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::Facing(facing, next) => format_execute(
+                prefix,
+                &format!("facing {facing} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::In(dim, next) => format_execute(
+                prefix,
+                &format!("in {dim} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::On(dim, next) => format_execute(
+                prefix,
+                &format!("on {dim} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::Positioned(pos, next) => format_execute(
+                prefix,
+                &format!("positioned {pos} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::Rotated(rot, next) => format_execute(
+                prefix,
+                &format!("rotated {rot} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::Store(store, next) => format_execute(
+                prefix,
+                &format!("store {store} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::Summon(entity, next) => format_execute(
+                prefix,
+                &format!("summon {entity} "),
+                next,
+                require_grouping,
+                options,
+                global_state,
+                function_state,
+            ),
+            Self::If(cond, then, el) => {
+                // TODO: group commands if needed and only run else commands if the first commands have not executed
+                let str_cond = cond.clone().compile(options, global_state, function_state);
+                let require_grouping = str_cond.len() > 1;
+                let then = then.compile_internal(
+                    String::new(),
+                    require_grouping,
+                    options,
+                    global_state,
+                    function_state,
+                );
+                let then_commands = combine_conditions_commands(str_cond, then);
+                let el = el
+                    .as_deref()
+                    .map(|el| {
+                        let else_cond =
+                            (!cond.clone()).compile(options, global_state, function_state);
+                        let el = el.compile_internal(
+                            String::new(),
+                            else_cond.len() > 1,
+                            options,
+                            global_state,
+                            function_state,
+                        );
+                        combine_conditions_commands(else_cond, el)
+                    })
+                    .unwrap_or_default();
+
+                then_commands
+                    .into_iter()
+                    .chain(el)
+                    .map(|cmd| prefix.clone() + &cmd + " ")
+                    .collect()
+            }
+            Self::Run(command) if !require_grouping => command
+                .compile(options, global_state, function_state)
+                .into_iter()
+                .map(|c| prefix.clone() + "run " + &c)
+                .collect(),
+            Self::Run(command) => Command::Group(vec![command.deref().clone()])
+                .compile(options, global_state, function_state)
+                .into_iter()
+                .map(|c| prefix.clone() + "run " + &c)
+                .collect(),
+            Self::Runs(commands) if !require_grouping => commands
+                .iter()
+                .flat_map(|c| c.compile(options, global_state, function_state))
+                .map(|c| prefix.clone() + "run " + &c)
+                .collect(),
+            Self::Runs(commands) => Command::Group(commands.clone())
+                .compile(options, global_state, function_state)
+                .into_iter()
+                .map(|c| prefix.clone() + "run " + &c)
+                .collect(),
+        }
+    }
+}
+
+fn format_execute(
+    prefix: String,
+    new: &str,
+    next: &Execute,
+    require_grouping: bool,
+    options: &CompileOptions,
+    global_state: &MutCompilerState,
+    function_state: &MutFunctionCompilerState,
+) -> Vec<String> {
+    next.compile_internal(
+        prefix + new,
+        require_grouping,
+        options,
+        global_state,
+        function_state,
+    )
+}
+
+fn combine_conditions_commands(conditions: Vec<String>, commands: Vec<String>) -> Vec<String> {
+    conditions
+        .into_iter()
+        .flat_map(|cond| commands.iter().map(move |cmd| cond.clone() + " " + cmd))
+        .collect()
+}
+
+#[allow(missing_docs)]
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub enum Condition {
     Atom(String),
@@ -30,11 +251,12 @@ pub enum Condition {
     Or(Box<Condition>, Box<Condition>),
 }
 impl Condition {
-    pub fn normalize(self) -> Self {
+    /// Normalize the condition.
+    pub fn normalize(&self) -> Self {
         match self {
-            Self::Atom(_) => self,
-            Self::Not(c) => match *c {
-                Self::Atom(c) => Self::Not(Box::new(Self::Atom(c))),
+            Self::Atom(_) => self.clone(),
+            Self::Not(c) => match *c.clone() {
+                Self::Atom(c) => Self::Not(Box::new(Self::Atom(c.clone()))),
                 Self::Not(c) => c.normalize(),
                 Self::And(c1, c2) => ((!*c1).normalize()) | ((!*c2).normalize()),
                 Self::Or(c1, c2) => ((!*c1).normalize()) & ((!*c2).normalize()),
@@ -43,6 +265,42 @@ impl Condition {
             Self::Or(c1, c2) => c1.normalize() | c2.normalize(),
         }
     }
+
+    /// Compile the condition into a list of strings.
+    pub fn compile(
+        &self,
+        _options: &CompileOptions,
+        _global_state: &MutCompilerState,
+        _function_state: &MutFunctionCompilerState,
+    ) -> Vec<String> {
+        match self.normalize() {
+            Self::Atom(a) => vec!["if ".to_string() + &a],
+            Self::Not(n) => match n.as_ref() {
+                Self::Atom(a) => vec!["unless ".to_string() + a],
+                _ => unreachable!("Cannot happen because of normalization"),
+            },
+            Self::And(c1, c2) => {
+                let c1 = c1.compile(_options, _global_state, _function_state);
+                let c2 = c2.compile(_options, _global_state, _function_state);
+
+                c1.into_iter()
+                    .flat_map(|c1| c2.iter().map(move |c2| c1.clone() + " " + c2))
+                    .collect()
+            }
+            Self::Or(c1, c2) => {
+                let mut c1 = c1.compile(_options, _global_state, _function_state);
+                let c2 = c2.compile(_options, _global_state, _function_state);
+                c1.extend(c2);
+                c1
+            }
+        }
+    }
+}
+
+impl From<&str> for Condition {
+    fn from(s: &str) -> Self {
+        Condition::Atom(s.to_string())
+    }
 }
 
 impl Not for Condition {
diff --git a/src/datapack/command/mod.rs b/src/datapack/command/mod.rs
index b9e6734..a5d592d 100644
--- a/src/datapack/command/mod.rs
+++ b/src/datapack/command/mod.rs
@@ -1,12 +1,15 @@
 //! Represents a command that can be included in a function.
 
 mod execute;
-pub use execute::Execute;
+
+pub use execute::{Condition, Execute};
 
 use serde::{Deserialize, Serialize};
 
 use crate::util::compile::{CompileOptions, MutCompilerState, MutFunctionCompilerState};
 
+use super::Function;
+
 /// Represents a command that can be included in a function.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum Command {
@@ -16,6 +19,8 @@ pub enum Command {
     Debug(String),
     /// Execute command
     Execute(Execute),
+    /// Group of commands to be called instantly after each other
+    Group(Vec<Command>),
 }
 
 impl Command {
@@ -30,14 +35,18 @@ impl Command {
         options: &CompileOptions,
         global_state: &MutCompilerState,
         function_state: &MutFunctionCompilerState,
-    ) -> String {
-        let _ = options;
-        let _ = global_state;
-        let _ = function_state;
+    ) -> Vec<String> {
         match self {
-            Self::Raw(command) => command.clone(),
+            Self::Raw(command) => vec![command.clone()],
             Self::Debug(message) => compile_debug(message, options),
-            Self::Execute(_) => todo!(),
+            Self::Execute(ex) => ex.compile(options, global_state, function_state),
+            Self::Group(commands) => {
+                // TODO: implement correctly
+                commands
+                    .iter()
+                    .flat_map(|c| c.compile(options, global_state, function_state))
+                    .collect()
+            }
         }
     }
 }
@@ -47,14 +56,24 @@ impl From<&str> for Command {
         Self::raw(command)
     }
 }
-
-fn compile_debug(message: &str, option: &CompileOptions) -> String {
-    if option.debug {
-        format!(
-            r#"tellraw @a [{{"text":"[","color":"dark_blue"}},{{"text":"DEBUG","color":"dark_green","hoverEvent":{{"action":"show_text","value":[{{"text":"Debug message generated by Shulkerbox"}},{{"text":"\nSet debug message to 'false' to disable"}}]}}}},{{"text":"]","color":"dark_blue"}},{{"text":" {}","color":"black"}}]"#,
-            message
-        )
-    } else {
-        String::new()
+impl From<&Function> for Command {
+    fn from(value: &Function) -> Self {
+        Self::Raw(format!("function {}:{}", value.namespace(), value.name()))
+    }
+}
+impl From<&mut Function> for Command {
+    fn from(value: &mut Function) -> Self {
+        Self::Raw(format!("function {}:{}", value.namespace(), value.name()))
+    }
+}
+
+fn compile_debug(message: &str, option: &CompileOptions) -> Vec<String> {
+    if option.debug {
+        vec![format!(
+            r#"tellraw @a [{{"text":"[","color":"dark_blue"}},{{"text":"DEBUG","color":"dark_green","hoverEvent":{{"action":"show_text","value":[{{"text":"Debug message generated by Shulkerbox"}},{{"text":"\nSet debug message to 'false' to disable"}}]}}}},{{"text":"]","color":"dark_blue"}},{{"text":" {}","color":"black"}}]"#,
+            message
+        )]
+    } else {
+        Vec::new()
     }
 }
diff --git a/src/datapack/function.rs b/src/datapack/function.rs
index f81354d..1242b39 100644
--- a/src/datapack/function.rs
+++ b/src/datapack/function.rs
@@ -2,6 +2,7 @@
 
 use std::sync::Mutex;
 
+use getset::Getters;
 use serde::{Deserialize, Serialize};
 
 use crate::{
@@ -12,20 +13,28 @@ use crate::{
 use super::command::Command;
 
 /// Function that can be called by a command
-#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+#[derive(Debug, Clone, Default, Serialize, Deserialize, Getters)]
 pub struct Function {
     commands: Vec<Command>,
+    /// Name of the function
+    #[get = "pub"]
+    name: String,
+    /// Namespace of the function
+    #[get = "pub"]
+    namespace: String,
 }
 
 impl Function {
-    /// Create a new function.
-    pub fn new() -> Self {
-        Self::default()
+    pub(in crate::datapack) fn new(namespace: &str, name: &str) -> Self {
+        Self {
+            commands: Vec::new(),
+            name: name.to_string(),
+            namespace: namespace.to_string(),
+        }
     }
-
     /// Add a command to the function.
-    pub fn add_command(&mut self, command: Command) {
-        self.commands.push(command);
+    pub fn add_command(&mut self, command: impl Into<Command>) {
+        self.commands.push(command.into());
     }
 
     /// Get the commands of the function.
@@ -40,7 +49,7 @@ impl Function {
         let content = self
             .commands
             .iter()
-            .map(|c| c.compile(options, state, &function_state))
+            .flat_map(|c| c.compile(options, state, &function_state))
             .collect::<Vec<String>>()
             .join("\n");
         VFile::Text(content)
diff --git a/src/datapack/mod.rs b/src/datapack/mod.rs
index 935389d..335e258 100644
--- a/src/datapack/mod.rs
+++ b/src/datapack/mod.rs
@@ -4,7 +4,7 @@ mod command;
 mod function;
 mod namespace;
 pub mod tag;
-pub use command::Command;
+pub use command::{Command, Condition, Execute};
 pub use function::Function;
 pub use namespace::Namespace;
 use serde::{Deserialize, Serialize};
@@ -72,13 +72,16 @@ impl Datapack {
         })
     }
 
-    /// Add a namespace to the datapack.
-    pub fn add_namespace(&mut self, namespace: Namespace) {
-        if !namespace.get_main_function().get_commands().is_empty() {
-            self.add_tick(&format!("{}:main", namespace.get_name()));
-        }
+    /// Get a namespace by name.
+    pub fn namespace(&self, name: &str) -> Option<&Namespace> {
+        self.namespaces.get(name)
+    }
+
+    /// Butably get a namespace by name or create a new one if it doesn't exist.
+    pub fn namespace_mut(&mut self, name: &str) -> &mut Namespace {
         self.namespaces
-            .insert(namespace.get_name().to_string(), namespace);
+            .entry(name.to_string())
+            .or_insert_with(|| Namespace::new(name))
     }
 
     /// Add a function to the tick function list.
diff --git a/src/datapack/namespace.rs b/src/datapack/namespace.rs
index 699e03e..eae527f 100644
--- a/src/datapack/namespace.rs
+++ b/src/datapack/namespace.rs
@@ -21,7 +21,7 @@ pub struct Namespace {
 
 impl Namespace {
     /// Create a new namespace.
-    pub fn new(name: &str) -> Self {
+    pub(in crate::datapack) fn new(name: &str) -> Self {
         Self {
             name: name.to_string(),
             functions: HashMap::new(),
@@ -54,9 +54,16 @@ impl Namespace {
         &self.tags
     }
 
-    /// Add a function to the namespace.
-    pub fn add_function(&mut self, name: &str, function: Function) {
-        self.functions.insert(name.to_string(), function);
+    /// Get a function by name.
+    pub fn function(&self, name: &str) -> Option<&Function> {
+        self.functions.get(name)
+    }
+
+    /// Mutably get a function by name or create a new one if it doesn't exist.
+    pub fn function_mut(&mut self, name: &str) -> &mut Function {
+        self.functions
+            .entry(name.to_string())
+            .or_insert_with(|| Function::new(&self.name, name))
     }
 
     /// Add a tag to the namespace.